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

Author: renovate[bot]

.github/workflows/fossa.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Fossa init
         run: |-
           curl -H 'Cache-Control: no-cache' https://raw.githubusercontent.com/fossas/fossa-cli/master/install.sh | bash

.github/workflows/test.yml

@@ -17,7 +17,7 @@ jobs:
         node-version: [12.x]
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       - name: Use Node.js ${{ matrix.node-version }}
         uses: actions/setup-node@v2