Update token usage in publish.yml workflow

Signed-off-by: Juan José Mata <juanjo.mata@gmail.com>

.github/workflows/publish.yml

@@ -429,7 +429,7 @@ jobs:
         uses: actions/checkout@v4.2.0
         with:
           ref: ${{ steps.source_branch.outputs.branch }}
-          token: ${{ secrets.GH_PAT }}
+          token: ${{ secrets.GH_PAT || github.token }}
 
       - name: Bump pre-release version
         run: |