Prevent forks from running nightly worfkflows (#5213)

* dont run nightly worfkflow on forks

* dont run nightly worfkflow on forks

* release notes

.github/workflows/publish-nightly-npm-packages.yml

@@ -10,6 +10,7 @@ jobs:
   build-and-pack:
     runs-on: ubuntu-latest
     name: Build and pack npm packages
+    if: github.event.repository.fork == false
     steps:
       - uses: actions/checkout@v4
 

upcoming-release-notes/5213.md

@@ -0,0 +1,6 @@
+---
+category: Maintenance
+authors: [MikesGlitch]
+---
+
+Prevent forks from running nightly Github worfkflows