Fix variable substitution (#2766)

.github/workflows/version-bump.yml

@@ -107,10 +107,10 @@ jobs:
         run: |
           git config --local user.email "41898282+github-actions[bot]@users.noreply.github.com"
           git config --local user.name "github-actions[bot]"
-          git commit -m "Bumped $CLIENT version to ${{ github.event.inputs.version_number }}" -a
+          git commit -m "Bumped ${CLIENT} version to ${{ github.event.inputs.version_number }}" -a
 
       - name: Push changes
-        run: git push -u origin $CLIENT_version_bump_${{ github.event.inputs.version_number }}
+        run: git push -u origin ${CLIENT}_version_bump_${{ github.event.inputs.version_number }}
 
       - name: Create Bump Version PR
         env: