docs(main): change gorelease config

Author: cuisongliu

.github/workflows/release.yml

@@ -25,7 +25,6 @@ jobs:
         run: |
           TAG=${GITHUB_REF#refs/tags/}
           echo tag_name=${TAG} >> $GITHUB_OUTPUT
-      - uses: sigstore/cosign-installer@v3.0.1
       - uses: docker/setup-qemu-action@e81a89b1732b9c48d79cd809d8d81d79c4647a18 # v2
       - uses: docker/setup-buildx-action@4b4e9c3e2d4531116a6f8ba8e71fc6e2cb6e6c8c # v2
       - name: Login to GitHub Container Registry

.goreleaser.yml

@@ -114,14 +114,6 @@ changelog:
       order: 400
     - title: Other work
       order: 9999
-docker_signs:
-  - cmd: cosign
-    artifacts: manifests
-    output: true
-    args:
-      - 'sign'
-      - '${artifact}@${digest}'
-      - --yes
 
 release:
   prerelease: auto