Update semgrep.yml

.github/workflows/semgrep.yml

@@ -1,24 +1,25 @@
+name: Semgrep
 on:
   workflow_dispatch: {}
   pull_request: {}
   push:
     branches:
-    - main
-    - master
+      - main
+      - master
     paths:
-    - .github/workflows/semgrep.yml
+      - .github/workflows/semgrep.yml
   schedule:
-  # random HH:MM to avoid a load spike on GitHub Actions at 00:00
-  - cron: 58 15 * * *
-name: Semgrep
+    # random HH:MM to avoid a load spike on GitHub Actions at 00:00
+    - cron: '18 13 * * *'
 jobs:
   semgrep:
     name: semgrep/ci
-    runs-on: self-hosted
+    runs-on: ubuntu-20.04
     env:
       SEMGREP_APP_TOKEN: ${{ secrets.SEMGREP_APP_TOKEN }}
     container:
       image: returntocorp/semgrep
+    if: (github.actor != 'dependabot[bot]')
     steps:
-    - uses: actions/checkout@v3
-    - run: semgrep ci
+      - uses: actions/checkout@v3
+      - run: semgrep ci