feat: Add Tailscale OAuth permission error troubleshooting guide and remove tag:ci from deploy workflow.

Author: C-o-m-o-n

.github/workflows/deploy-pi.yml

@@ -19,7 +19,6 @@ jobs:
         with:
           oauth-client-id: ${{ secrets.TS_OAUTH_CLIENT_ID }}
           oauth-secret: ${{ secrets.TS_OAUTH_SECRET }}
-          tags: tag:ci
 
       - name: Deploy to Raspberry Pi
         uses: appleboy/ssh-action@v1.2.1