use right token

Author: MoteHue

.github/workflows/overcloud-host-image-build.yml

@@ -400,7 +400,7 @@ jobs:
           -f rocky9_tag=${{ steps.host_image_tag.outputs.host_image_tag }} \
           -f ubuntu_noble_tag=${{ steps.host_image_tag.outputs.host_image_tag }}
         env:
-          GITHUB_TOKEN: ${{ secrets.STACKHPC_RELEASE_TRAIN_TOKEN }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           BRANCH_NAME: ${{ github.head_ref || github.ref_name }}
 
       - name: Display link to update overcloud host image tags workflows