fix: use GH_TOKEN for protected branch push in changelog workflows

Use GH_TOKEN instead of GITHUB_TOKEN to bypass branch protection rules
when pushing CHANGELOG updates directly to main branch.

Author: RAprogramm

.github/workflows/changelog-update.yml

@@ -27,7 +27,7 @@ jobs:
         uses: actions/checkout@v4
         with:
           fetch-depth: 0
-          token: ${{ secrets.GITHUB_TOKEN }}
+          token: ${{ secrets.GH_TOKEN }}
 
       - name: Install git-cliff
         uses: taiki-e/install-action@v2

.github/workflows/changelog.yml

@@ -28,7 +28,7 @@ jobs:
         uses: actions/checkout@v4
         with:
           fetch-depth: 0
-          token: ${{ secrets.GITHUB_TOKEN }}
+          token: ${{ secrets.GH_TOKEN }}
 
       - name: Install git-cliff
         uses: taiki-e/install-action@v2