[github] fix docker workflow (#4831)

- run only on tagged commits and not on every commit to master
- use the correct github token

.github/workflows/docker.yml

@@ -2,8 +2,6 @@ name: docker
 
 on:
   push:
-    branches:
-    - master
     tags:
     - v[0-9]+.[0-9]+.[0-9]+
 
@@ -28,7 +26,7 @@ jobs:
       with:
         registry: ghcr.io
         username: ${{ github.repository_owner }}
-        password: ${{ github.token }}
+        password: ${{ secrets.github_token }}
 
     - name: Login to DockerHub
       uses: docker/login-action@v3