fix: exclude .git from rsync so wiki push targets the wiki repo

rsync --delete was deleting wiki/.git, causing git to fall back to the
main repo remote and fail branch protection rules.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: taylorarndt

.github/workflows/sync-docs-to-wiki.yml

@@ -30,7 +30,7 @@ jobs:
 
       - name: Sync docs to wiki
         run: |
-          rsync -av --delete docs/ wiki/
+          rsync -av --delete --exclude='.git' docs/ wiki/
           cd wiki
           git add -A
           if [ -n "$(git status --porcelain)" ]; then