improve comments

Author: aminya

script/vsts/nightly-release.yml

@@ -1,5 +1,5 @@
 jobs:
-  # Import "GetReleaseVersion" job definition, with the "NightlyFlag" parameter set
+  # GetReleaseVersion for nightly release
   - template: platforms/templates/get-release-version.yml
     parameters:
       NightlyFlag: --nightly

script/vsts/pull-requests.yml

@@ -1,7 +1,7 @@
 trigger: none # No CI builds, only PR builds
 
 jobs:
-  # Import "GetReleaseVersion" job definition
+  # GetReleaseVersion
   - template: platforms/templates/get-release-version.yml
 
   # Import OS-specific build definitions

script/vsts/release-branch-build.yml

@@ -5,7 +5,7 @@ trigger:
 pr: none # no PR triggers
 
 jobs:
-  # Import "GetReleaseVersion" job definition
+  # GetReleaseVersion
   - template: platforms/templates/get-release-version.yml
 
   # Import OS-specific build definitions.