Fix bug in update getting started guide workflow

This change fixes a bug in the update getting started guide workflow
when assertions are disabled. This change also fixes a bug where
'--verbose' executed git diff command in interactive mode.

Signed-off-by: Austin Vazquez <macedonv@amazon.com>

.github/workflows/update-getting-started-guide.yml

@@ -23,21 +23,15 @@ jobs:
       contents: read
       pull-requests: read
 
-    env:
-      RELEASE_TAG: ''
-
     steps:
       - uses: actions/checkout@v4
         with:
           sparse-checkout: |
             docs/getting-started.md
             scripts/update-getting-started-guide-version.sh
 
-      - name: Mock release tag on pull request
-        run: echo "RELEASE_TAG=v0.0.0-${{ github.event.pull_request.number }}" >> $GITHUB_ENV
-
       - name: Test update getting started version
-        run: bash scripts/update-getting-started-guide-version.sh --assert ${{ env.RELEASE_TAG }}
+        run: bash scripts/update-getting-started-guide-version.sh --assert v0.0.0-${{ github.event.pull_request.number }}
 
   update-version:
     if: github.event_name == 'release'

scripts/update-getting-started-guide-version.sh

@@ -69,5 +69,11 @@ assert_diff() {
 
 sed -i -E "s/version=\"([0-9]+\.){2}[0-9]+\"/version=\"${VERSION}\"/" docs/getting-started.md
 
-[ $VERBOSE = true ] && git diff
-[ $ASSERT = true ] && assert_diff
+if [ $VERBOSE = true ]; then
+  git --no-pager diff
+fi
+
+if [ $ASSERT = true ]; then
+  assert_diff
+fi
+