Fix comment typos in build props (#56544)

Author: gitslav

eng/Build.props

@@ -88,7 +88,7 @@
         <!-- Build the targeting pack installers -->
         <ProjectToBuild Include="$(RepoRoot)src\Installers\Windows\TargetingPack\TargetingPack.wixproj" AdditionalProperties="Platform=x64" />
         <ProjectToBuild Include="$(RepoRoot)src\Installers\Windows\TargetingPack\TargetingPack.wixproj" AdditionalProperties="Platform=x86" />
-        <!-- This really shouldn't be here, but instead of harvesting from the intermediate/output directories, the targetting pack installer logic
+        <!-- This really shouldn't be here, but instead of harvesting from the intermediate/output directories, the targeting pack installer logic
         harvests from a zip of the reference assemblies. Producing it in each leg ends up with multiple targeting packs
         getting produced and the BAR will reject the build. Centralize building the targeting pack in the x86/x64 leg. -->
         <ProjectToBuild Include="$(RepoRoot)src\Installers\Windows\TargetingPack\TargetingPack.wixproj" AdditionalProperties="Platform=arm64" />

eng/Signing.props

@@ -100,7 +100,7 @@
   <ItemGroup Label="Code sign exclusions">
     <!-- We don't need to code sign .js files because they are not used in Windows Script Host. -->
     <FileExtensionSignInfo Include=".js" CertificateName="None" />
-    <!-- We don't produce font files. We rebundle some for using the web brower, so they do not need to be signed. -->
+    <!-- We don't produce font files. We rebundle some for using the web browser, so they do not need to be signed. -->
     <FileExtensionSignInfo Include=".otf" CertificateName="None" />
     <FileExtensionSignInfo Include=".ttf" CertificateName="None" />
     <!-- This is a text file which doesn't need to be code signed, even though some .mof files can be signed. -->