Apply suggestions from code review

Co-authored-by: Nirmal Guru <Nirmal4G@gmail.com>

Author: marcelwgn

Microsoft.Toolkit.Uwp.SampleApp/SamplePages/samples.json

@@ -501,7 +501,7 @@
         "Name": "Fade",
         "Subcategory": "Effect",
         "About": "Opacity of XAML elements using composition animations",
-        "CodeUrl": "https://github.com/windows-toolkit/WindowsCommunityToolkit/tree/master/Microsoft.Toolkit.Uwp.UI.Animations/",
+        "CodeUrl": "https://github.com/windows-toolkit/WindowsCommunityToolkit/tree/main/Microsoft.Toolkit.Uwp.UI.Animations/",
         "CodeFile": "/SamplePages/Animations/Effects/FadeBehaviorCode.bind",
         "XamlCodeFile": "/SamplePages/Animations/Effects/FadeBehaviorXaml.bind",
         "Icon": "/SamplePages/Animations/Effects/FadeBehavior.png",
@@ -511,7 +511,7 @@
         "Name": "Scale",
         "Subcategory": "Behavior",
         "About": "Scale of XAML elements using composition",
-        "CodeUrl": "https://github.com/windows-toolkit/WindowsCommunityToolkit/tree/master/Microsoft.Toolkit.Uwp.UI.Animations/",
+        "CodeUrl": "https://github.com/windows-toolkit/WindowsCommunityToolkit/tree/main/Microsoft.Toolkit.Uwp.UI.Animations/",
         "CodeFile": "/SamplePages/Animations/Behaviors/ScaleBehaviorCode.bind",
         "XamlCodeFile": "/SamplePages/Animations/Behaviors/ScaleBehaviorXaml.bind",
         "Icon": "/SamplePages/Animations/Behaviors/ScaleBehavior.png",
@@ -521,7 +521,7 @@
         "Name": "Offset",
         "Subcategory": "Behavior",
         "About": "Offset of XAML elements using composition",
-        "CodeUrl": "https://github.com/windows-toolkit/WindowsCommunityToolkit/tree/master/Microsoft.Toolkit.Uwp.UI.Animations/",
+        "CodeUrl": "https://github.com/windows-toolkit/WindowsCommunityToolkit/tree/main/Microsoft.Toolkit.Uwp.UI.Animations/",
         "CodeFile": "/SamplePages/Animations/Behaviors/OffsetBehaviorCode.bind",
         "XamlCodeFile": "/SamplePages/Animations/Behaviors/OffsetBehaviorXaml.bind",
         "Icon": "/SamplePages/Animations/Behaviors/OffsetBehavior.png",
@@ -531,7 +531,7 @@
         "Name": "Rotate",
         "Subcategory": "Behavior",
         "About": "Rotation on XAML elements using composition",
-        "CodeUrl": "https://github.com/windows-toolkit/WindowsCommunityToolkit/tree/master/Microsoft.Toolkit.Uwp.UI.Animations/",
+        "CodeUrl": "https://github.com/windows-toolkit/WindowsCommunityToolkit/tree/main/Microsoft.Toolkit.Uwp.UI.Animations/",
         "CodeFile": "/SamplePages/Animations/Behaviors/RotateBehaviorCode.bind",
         "XamlCodeFile": "/SamplePages/Animations/Behaviors/RotateBehaviorXaml.bind",
         "Icon": "/SamplePages/Animations/Behaviors/RotateBehavior.png",
@@ -541,7 +541,7 @@
         "Name": "Blur",
         "Subcategory": "Behavior",
         "About": "Blur XAML elements using composition",
-        "CodeUrl": "https://github.com/windows-toolkit/WindowsCommunityToolkit/tree/master/Microsoft.Toolkit.Uwp.UI.Animations/",
+        "CodeUrl": "https://github.com/windows-toolkit/WindowsCommunityToolkit/tree/main/Microsoft.Toolkit.Uwp.UI.Animations/",
         "CodeFile": "/SamplePages/Animations/Behaviors/BlurBehaviorCode.bind",
         "XamlCodeFile": "/SamplePages/Animations/Behaviors/BlurBehaviorXaml.bind",
         "Icon": "/SamplePages/Animations/Behaviors/BlurBehavior.png",
@@ -552,7 +552,7 @@
         "Name": "Saturation",
         "Subcategory": "Behavior",
         "About": "Saturate XAML elements using composition",
-        "CodeUrl": "https://github.com/windows-toolkit/WindowsCommunityToolkit/tree/master/Microsoft.Toolkit.Uwp.UI.Animations/",
+        "CodeUrl": "https://github.com/windows-toolkit/WindowsCommunityToolkit/tree/main/Microsoft.Toolkit.Uwp.UI.Animations/",
         "CodeFile": "/SamplePages/Animations/Behaviors/SaturationBehaviorCode.bind",
         "XamlCodeFile": "/SamplePages/Animations/Behaviors/SaturationBehaviorXaml.bind",
         "Icon": "/SamplePages/Animations/Behaviors/SaturationBehavior.png",
@@ -564,7 +564,7 @@
         "Type": "FadeHeaderBehaviorPage",
         "Subcategory": "Effect",
         "About": "Fade ListView and GridView Headers",
-        "CodeUrl": "https://github.com/windows-toolkit/WindowsCommunityToolkit/tree/master/Microsoft.Toolkit.Uwp.UI.Animations/",
+        "CodeUrl": "https://github.com/windows-toolkit/WindowsCommunityToolkit/tree/main/Microsoft.Toolkit.Uwp.UI.Animations/",
         "CodeFile": "FadeHeaderBehaviorCode.bind",
         "XamlCodeFile": "FadeHeaderBehaviorXaml.bind",
         "Icon": "/SamplePages/FadeHeader/FadeHeaderBehavior.png",
@@ -1272,7 +1272,7 @@
         "Name": "GazeTracing",
         "Type": "GazeTracingPage",
         "About": "Shows how to use the Windows 10 API for eye trackers",
-        "CodeUrl": "https://github.com/windows-toolkit/WindowsCommunityToolkit/tree/master/Microsoft.Toolkit.Uwp.Input.GazeInteraction/",
+        "CodeUrl": "https://github.com/windows-toolkit/WindowsCommunityToolkit/tree/main/Microsoft.Toolkit.Uwp.Input.GazeInteraction/",
         "XamlCodeFile": "GazeTracingXaml.bind",
         "CodeFile": "GazeTracingCode.bind",
         "Icon": "/SamplePages/GazeTracing/GazeTracing.png",