Fix overlay syntax error

[lcawl]

This PR addresses an error that occurs when you run the "make overlay-docs" command due to invalid spacing in the overlay file.

[szabosteve]

LGTM, thank you for fixing it!

[github-actions]

The backport to 8.x failed:

The process '/usr/bin/git' failed with exit code 1

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add .worktrees/backport-8.x 8.x
# Navigate to the new working tree
cd .worktrees/backport-8.x
# Create a new branch
git switch --create backport-2938-to-8.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 b8b5b43c9d42f53545cf58769a8c1e6ce5e9cd72
# Push it to GitHub
git push --set-upstream origin backport-2938-to-8.x
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-8.x

Then, create a pull request where the base branch is 8.x and the compare/head branch is backport-2938-to-8.x.

[lcawl]

Verified that backport isn't required after all.