let the action run on Gitea

isGhes() reads GITHUB_SERVER_URL and takes every host but github.com and
its enterprise ones for a GHES, where the v4 artifact backend is absent.
On Gitea that backend is there and answers, but the check runs on the
runner ahead of any request, so the upload never starts. It now returns
false. See GITEA-PATCH.md.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

dist/upload/index.js

@@ -2903,7 +2903,10 @@ function isGhes() {
     const isGitHubHost = hostname === 'GITHUB.COM';
     const isGheHost = hostname.endsWith('.GHE.COM');
     const isLocalHost = hostname.endsWith('.LOCALHOST');
-    return !isGitHubHost && !isGheHost && !isLocalHost;
+    // Patched for Gitea. The host is neither github.com nor an enterprise one,
+    // and the check would turn the upload down before it made a request — see
+    // GITEA-PATCH.md
+    return false;
 }
 exports.isGhes = isGhes;
 function getGitHubWorkspaceDir() {