chore(deps): update actions/checkout action to v4 (#609)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/release-please.yml

@@ -19,7 +19,7 @@ jobs:
           token: ${{ steps.get-token.outputs.token }}
           release-type: node
           package-name: '@netlify/plugin-lighthouse'
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         if: ${{ steps.release.outputs.releases_created }}
       - uses: actions/setup-node@v4
         with:

.github/workflows/test.yml

@@ -18,7 +18,7 @@ jobs:
         node-version: [14.x, 16.x, 18.x, 19.x]
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Use Node.js ${{ matrix.node-version }}
         uses: actions/setup-node@v4
         with: