chore(deps): update actions/checkout action to v2 (#52)

Co-authored-by: Renovate Bot <bot@renovateapp.com>

Author: renovate[bot]

.github/workflows/review-suggest.yml

@@ -7,7 +7,7 @@ jobs:
     name: runner / suggester / spotless
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2 # required to compare
+      - uses: actions/checkout@v2
         with:
           ref: master
       - uses: actions/checkout@v2