fix(gitea): use token instead of password

.gitea/workflows/docker-build.yml

@@ -21,7 +21,7 @@ jobs:
         with:
           registry: git.pihkaal.xyz
           username: ${{ secrets.REGISTRY_USERNAME }}
-          password: ${{ secrets.REGISTRY_PASSWORD }}
+          password: ${{ secrets.REGISTRY_TOKEN }}
 
       - name: Build and push Docker image
         run: |