chore: bump version to v2.20.1

- Fix mixed mode organization strategy not persisting after page refresh
- Update README to be more concise and use RayLabsHQ organization links
- Remove unimplemented OIDC/SSO authentication references
- Update dependencies to latest versions

package.json

@@ -1,7 +1,7 @@
 {
   "name": "gitea-mirror",
   "type": "module",
-  "version": "2.20.0",
+  "version": "2.20.1",
   "engines": {
     "bun": ">=1.2.9"
   },