Fixes invalid yaml in nightly job (#971)

The nightly job didn't set any permissions, so the release job in
release-common inherits default read permissions.

Author: Vighnesh-V

.github/workflows/nightly.yml

@@ -53,6 +53,8 @@ jobs:
   release-common:
     needs: changes
     if: ${{ needs.changes.outputs.proceed == 'true' }}
+    permissions:
+      contents: write
     uses: ./.github/workflows/release-common.yml
     with:
       branch: primary

.github/workflows/release.yml

@@ -20,6 +20,8 @@ jobs:
 
   release-common:
     needs: validate
+    permissions:
+      contents: write
     uses: ./.github/workflows/release-common.yml
     with:
       branch: ${{ github.ref_name }}