Add step for snapshot

Only run release steps on tags to avoid failure

.github/workflows/plugin.yaml

@@ -25,7 +25,17 @@ jobs:
           go-version: '1.21.3'
           check-latest: true
 
+      - name: Run GoReleaser Snapshot
+        if: ${{ ! startsWith(github.ref, 'refs/tags/') }}
+        uses: goreleaser/goreleaser-action@7ec5c2b0c6cdda6e8bbb49444bc797dd33d74dd8 # v5.0.0
+        with:
+          version: latest
+          args: release --snapshot --clean
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      
       - name: Run GoReleaser
+        if: ${{ startsWith(github.ref, 'refs/tags/') }}
         uses: goreleaser/goreleaser-action@7ec5c2b0c6cdda6e8bbb49444bc797dd33d74dd8 # v5.0.0
         with:
           version: latest
@@ -34,6 +44,7 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Update new version in krew-index
+        if: ${{ startsWith(github.ref, 'refs/tags/') }}
         uses: rajatjindal/krew-release-bot@df3eb197549e3568be8b4767eec31c5e8e8e6ad8 # v0.0.46
         with:
           krew_template_file: cmd/plugin/krew.yaml