Update docker-publish.yaml

Author: cdupuis

.github/workflows/docker-publish.yaml

@@ -65,7 +65,7 @@ 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 on Push
-        if: ${{ github.event_name != 'pull_request' }}
+        if: ${{ github.event_name == 'push' }}
         id: build-and-push
         uses: docker/build-push-action@ac9327eae2b366085ac7f6a2d02df8aa8ead720a
         with:
@@ -78,7 +78,7 @@ jobs:
           labels: ${{ steps.meta.outputs.labels }}
 
       - name: Build and push Docker image on PR
-        if: ${{ github.event_name == 'pull_request' }}
+        if: ${{ github.event_name == 'pull_request_target' }}
         id: build-and-push-pr
         uses: docker/build-push-action@ac9327eae2b366085ac7f6a2d02df8aa8ead720a
         with:
@@ -91,7 +91,7 @@ jobs:
 
       # Extract SBOMs for images that are not getting pushed to the registry
       - name: Extract and upload SBOM
-        if: ${{ github.event_name == 'pull_request' }}
+        if: ${{ github.event_name == 'pull_request_target' }}
         id: sbom
         uses: atomist-skills/index-image-action@main
         with: