ci: use ubuntu-latest runner for docker and release jobs

.gitea/workflows/ci.yml

@@ -48,7 +48,7 @@ jobs:
 
   docker:
     needs: test
-    runs-on: [self-hosted, linux, docker]
+    runs-on: [ubuntu-latest]
     if: github.event_name == 'push' && github.ref == 'refs/heads/main'
     steps:
       - name: Checkout code
@@ -135,7 +135,7 @@ jobs:
 
   release:
     needs: docker
-    runs-on: [self-hosted, linux, docker]
+    runs-on: [ubuntu-latest]
     if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags/')
     steps:
       - name: Checkout code