Try to simplify CI (#40)

Copies seek-oss/skuba#1477.

Author: 72636c

.github/workflows/validate.yml

@@ -22,24 +22,10 @@ jobs:
     name: Lint & Test
     runs-on: ubuntu-latest
     steps:
-      - if: >-
-          github.actor != 'dependabot[bot]' && (
-            github.event_name != 'pull_request' ||
-            github.event.pull_request.head.repo.full_name == github.repository
-          )
-        name: Check out repo
+      - name: Check out repo
         uses: actions/checkout@v4
         with:
-          token: ${{ secrets.SEEK_OSS_CI_GITHUB_TOKEN }}
-
-      - if: >-
-          github.actor == 'dependabot[bot]' || (
-            github.event_name == 'pull_request' &&
-            github.event.pull_request.head.repo.full_name != github.repository
-          )
-        name: Check out repo
-        uses: actions/checkout@v4
-        # We don't share secrets with Dependabot nor forks.
+          token: ${{ secrets.SEEK_OSS_CI_GITHUB_TOKEN || github.token }}
 
       - name: Set up Node.js
         uses: actions/setup-node@v4