Wrap markdown code

Author: desrosj

.github/workflows/list-changed-files.yml

@@ -68,7 +68,7 @@ jobs:
         run: |
           DIFF_OUTPUT=$(git diff --name-status "$OLD_TAG"..."$NEW_TAG" | grep -E "^($PATTERN)" | cut -c3-)
           if [ -n "$DIFF_OUTPUT" ]; then
-            echo "$DIFF_OUTPUT" >> "$GITHUB_STEP_SUMMARY"
+            echo "```$DIFF_OUTPUT```" >> "$GITHUB_STEP_SUMMARY"
           else
             echo "No files $DESCRIPTION found" >> "$GITHUB_STEP_SUMMARY"
           fi