fix: pin @apify/ui-library to <1.120.0 to fix docs build

@apify/ui-library 1.120.0+ breaks SSG with the Rspack bundler, causing
a module resolution error (M7) during the Docusaurus build.

See #607

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

Author: vdusek

website/package.json

@@ -47,5 +47,8 @@
         "rimraf": "^6.0.0",
         "typescript": "^5.0.0"
     },
+    "resolutions": {
+        "@apify/ui-library": "<1.120.0"
+    },
     "packageManager": "yarn@4.12.0"
 }