Fix YAML syntax error in community_pr_test workflow

Multi-line shell strings with unindented content broke the YAML block
scalar. Use printf to build PR body strings within proper indentation.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: skyamgarp

.github/workflows/community_pr_test.yml

@@ -91,15 +91,16 @@ jobs:
             exit 0
           fi
 
+          PR_BODY=$(printf '%s\n\n%s\n%s\n%s\n\n%s' \
+            "Automated test PR to run CI on behalf of community PR #${COMMUNITY_PR_NUMBER}." \
+            "**Original PR:** ${COMMUNITY_PR_URL}" \
+            "**Author:** @${COMMUNITY_PR_AUTHOR}" \
+            "**Fork:** \`${COMMUNITY_PR_FORK}\`" \
+            "> **Note:** This PR was created automatically when the \`ok-to-test\` label was applied. Do not merge — close it once tests complete and review the original PR instead.")
+
           gh pr create \
             --title "[Test] Community PR #${COMMUNITY_PR_NUMBER}: ${COMMUNITY_PR_TITLE}" \
-            --body "Automated test PR to run CI on behalf of community PR #${COMMUNITY_PR_NUMBER}.
-
-**Original PR:** ${COMMUNITY_PR_URL}
-**Author:** @${COMMUNITY_PR_AUTHOR}
-**Fork:** \`${COMMUNITY_PR_FORK}\`
-
-> **Note:** This PR was created automatically when the \`ok-to-test\` label was applied. Do not merge — close it once tests complete and review the original PR instead." \
+            --body "${PR_BODY}" \
             --base main \
             --head "${BRANCH}"
 
@@ -118,8 +119,9 @@ jobs:
           # Extract the original PR number from the branch name (community-pr-test-<N>)
           COMMUNITY_PR_NUMBER="${BRANCH#community-pr-test-}"
 
-          gh pr comment "${COMMUNITY_PR_NUMBER}" \
-            --body "CI tests failed on the test PR for this community PR. Please review the failures and push a fix.
+          COMMENT_BODY=$(printf '%s\n\n%s\n%s' \
+            "CI tests failed on the test PR for this community PR. Please review the failures and push a fix." \
+            "**Test PR:** ${TEST_PR_URL}" \
+            "**CI run:** ${{ github.event.workflow_run.html_url }}")
 
-**Test PR:** ${TEST_PR_URL}
-**CI run:** ${{ github.event.workflow_run.html_url }}"
+          gh pr comment "${COMMUNITY_PR_NUMBER}" --body "${COMMENT_BODY}"