Added git-secrets check to Github Action (#520)

.github/workflows/ci.yml

@@ -0,0 +1,26 @@
+name: CI Checks
+on:
+  push:
+    branches: ["**"]
+  pull_request:
+    branches: [master]
+  workflow_dispatch:
+jobs:
+  git-secrets:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: recursive
+      - name: Checkout awslabs/git-secrets
+        uses: actions/checkout@v2
+        with:
+          repository: awslabs/git-secrets
+          ref: master
+          path: git-secrets
+      - name: Install git-secrets
+        run: cd git-secrets && sudo make install && cd ..
+      - name: Run git-secrets
+        run: |
+          git-secrets --register-aws
+          git-secrets --scan