chore: maybe fix Slack notification workflow [skip ci] (#119)

Author: Eugene Cheung

.github/workflows/release-monocdk.yml

@@ -131,9 +131,6 @@ project.release.addJobs({
         name: "Get release",
         id: "get_release",
         uses: "cardinalby/git-get-release-action@v1",
-        with: {
-          searchLimit: 1,
-        },
         env: {
           GITHUB_TOKEN: "${{ github.token }}",
         },