Fix DCO action

Signed-off-by: Dan Lynn <dan.lynn@fivetran.com>

Author: Dan Lynn

.github/workflows/dco.yml

@@ -1,12 +1,17 @@
-name: DCO
-
-on:
-  pull_request:
-    branches: [main]
+name: Sanity check
+on: [pull_request]
 
 jobs:
-  dco:
-    name: DCO Check
+  commits_check_job:
     runs-on: ubuntu-latest
+    name: Commits Check
     steps:
-      - uses: tim-actions/dco@main
+    - name: Get PR Commits
+      id: 'get-pr-commits'
+      uses: tim-actions/get-pr-commits@master
+      with:
+        token: ${{ secrets.GITHUB_TOKEN }}
+    - name: DCO Check
+      uses: tim-actions/dco@master
+      with:
+        commits: ${{ steps.get-pr-commits.outputs.commits }}