Update README.md

Both methods are using "github", so I think we probably want to be a little clearer on this.

Author: ps2

README.md

@@ -1,8 +1,8 @@
 # LoopWorkspace
 
-The Loop app can be built using GitHub in a browser on any computer or using a Mac with Xcode.
+The Loop app can be built using GitHub workflows in a browser on any computer or using a Mac with Xcode.
 
-* Non-developers may prefer the GitHub method
+* Non-developers may prefer the GitHub workflow method
 * Developers or Loopers who want full build control may prefer the Mac/Xcode method
 
 ## GitHub Build Instructions