build: allow test-internet on forks if not scheduled

Refs: nodejs/node#44054 (comment)
PR-URL: nodejs/node#44073
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Mestery <mestery@protonmail.com>

.github/workflows/test-internet.yml

@@ -29,7 +29,7 @@ permissions:
 
 jobs:
   test-internet:
-    if: github.repository == 'nodejs/node'
+    if: github.repository == 'nodejs/node' || github.event_name != 'schedule'
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3