Pin github workflows to a commit hash instead of version tag for security purpose

Author: jkim-notion

.github/workflows/ci.yml

@@ -14,10 +14,10 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/setup-node@v3
+      - uses: actions/setup-node@3235b876344d2a9aa001b8d1453c930bba69e610 # v3
         with:
           node-version: ${{ env.NODE_VERSION }}
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3
       - run: |
           npm install
           npm run typecheck