fix(ci): reduce build-windows timeout to 5m until runner is registered

60-minute wait blocks every run. 5 minutes lets it fail fast with
continue-on-error, leaving the rest of the workflow unaffected.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.forgejo/workflows/ci.yml

@@ -65,7 +65,7 @@ jobs:
     needs: check
     if: github.ref == 'refs/heads/main'
     continue-on-error: true
-    timeout-minutes: 60
+    timeout-minutes: 5
 
     steps:
       - uses: actions/checkout@v4