Use mcp servers repo in checkout action

Author: colinmcneil

.github/workflows/mcp_images.yml

@@ -10,6 +10,7 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v3
         with:
+          repository: modelcontextprotocol/servers
           ref: ${{ github.event.client_payload.ref }}
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3