Merge pull request modelcontextprotocol#121 from jonathanhefner/deploy-docs-no-force-push

Preserve existing files on `gh-pages` during docs deploy

Author: jonathanhefner

.github/workflows/docs.yml

@@ -25,4 +25,4 @@ jobs:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           publish_dir: ./docs
           publish_branch: gh-pages
-          force_orphan: true
+          keep_files: true