fix: docker login username and password (#59)

Author: amyXia1994

.github/workflows/release.yml

@@ -48,8 +48,8 @@ jobs:
       - name: Login to Docker Hub
         uses: docker/login-action@v2
         with:
-          username: ${{ secrets.DOCKERHUB_USERNAME }}
-          password: ${{ secrets.DOCKERHUB_PASSWORD }}
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
       # <--- End --->
       - name: Run GoReleaser
         uses: goreleaser/goreleaser-action@v4