Test workflow 2; commit only docs

Author: kiran-garre

docs-generation/create-docs-pr.sh

@@ -13,9 +13,12 @@ fi
 git config user.name "docs-generator[bot]"
 git config user.email "docs-generator[bot]@amazon.com"
 
-# Create branch and push
-git checkout -b "$BRANCH_NAME"
-git add .
+# Create branch, pull if needed (for updating existing docs PRs), and push
+git checkout -B "$BRANCH_NAME"
+if git ls-remote --exit-code --heads origin $BRANCH_NAME; then
+    git pull origin $BRANCH_NAME
+fi
+git add docs
 git commit -m "Update docs based on PR #$PR_NUMBER
 
 Auto-generated by Q"