feat: test out github action for release notes

Signed-off-by: Elizabeth J Lee <[email protected]>

.github/workflows/release-notes-preview.yaml

@@ -0,0 +1,21 @@
+name: Release-Notes-Preview
+
+on:
+push:
+    branches:
+      - main
+  pull_request:
+
+jobs:
+  preview:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - run: |
+        git fetch --prune --unshallow --tags
+    - uses: snyk/[email protected]
+      with:
+        releaseBranch: main
+      env:
+        GITHUB_PR_USERNAME: ${{ github.actor }}
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}