fix: add fallback to GITHUB_TOKEN for checkout token

- Use GH_PAT if available, otherwise fallback to GITHUB_TOKEN
- This prevents 'token not supplied' errors when GH_PAT is not configured

.github/workflows/release-manual.yml

@@ -21,7 +21,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 1
-          token: ${{ secrets.GH_PAT }}
+          token: ${{ secrets.GH_PAT || secrets.GITHUB_TOKEN }}
 
       - name: Validate version
         run: |
@@ -77,7 +77,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 1
-          token: ${{ secrets.GH_PAT }}
+          token: ${{ secrets.GH_PAT || secrets.GITHUB_TOKEN }}
           ref: 'main'
 
       - name: Download all artifacts