fix(ifc-converter): broken Contributions GitHub URL (#335)

apps/ifc-converter/app/page.tsx pointed at
github.com/pascalorg/editor/apps/ifc-converter which 404s. The
canonical path includes /tree/main/. Same URL is reused by the
forthcoming community /ifc page (in pascalorg/private-editor) so
keeping them consistent matters.

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/ifc-converter/next-env.d.ts

@@ -1,6 +1,6 @@
 /// <reference types="next" />
 /// <reference types="next/image-types/global" />
-import "./.next/types/routes.d.ts";
+import './.next/types/routes.d.ts'
 
 // NOTE: This file should not be edited
 // see https://nextjs.org/docs/app/api-reference/config/typescript for more information.