ci: use PAT for ghcr

Author: rmfranken

.github/workflows/main.yml

@@ -92,7 +92,7 @@ jobs:
         with:
           registry: ghcr.io
           username: ${{ github.actor }}
-          password: ${{ secrets.GITHUB_TOKEN }}
+          password: ${{ secrets.GHCR_TOKEN }}
 
       - name: Docker meta
         id: meta