refactor: remove duplicated line

.github/workflows/docker-publish.yml

@@ -31,12 +31,12 @@ jobs:
 
     steps:
       - name: Checkout repository
+        if: ${{ github.event_name != 'pull_request' && contains(github.event.head_commit, 'Dockerfile')}}
         uses: actions/checkout@v3
 
       # Install the cosign tool except on PR
       # https://github.com/sigstore/cosign-installer
       - name: Install cosign
-        if: github.event_name != 'pull_request'
         uses: sigstore/cosign-installer@6e04d228eb30da1757ee4e1dd75a0ec73a653e06 #v3.1.1
         with:
           cosign-release: 'v2.1.1'
@@ -70,7 +70,6 @@ jobs:
       # Build and push Docker image with Buildx (don't push on PR)
       # https://github.com/docker/build-push-action
       - name: Build and push Docker image
-        if: ${{ github.event_name != 'pull_request' && contains(github.event.head_commit, 'Dockerfile')}}
         id: build-and-push
         uses: docker/build-push-action@0565240e2d4ab88bba5387d719585280857ece09 # v5.0.0
         with:
@@ -87,7 +86,6 @@ jobs:
       # transparency data even for private images, pass --force to cosign below.
       # https://github.com/sigstore/cosign
       - name: Sign the published Docker image
-        if: ${{ github.event_name != 'pull_request' && contains(github.event.head_commit, 'Dockerfile')}}
         env:
           # https://docs.github.com/en/actions/security-guides/security-hardening-for-github-actions#using-an-intermediate-environment-variable
           TAGS: ${{ steps.meta.outputs.tags }}