Update actions/checkout

Author: kanga333

.github/workflows/example.yml

@@ -8,7 +8,7 @@ jobs:
   matrix_input:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: ./
         id: array
         with:

.github/workflows/test.yml

@@ -9,15 +9,15 @@ jobs:
   unit_test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - run: |
           npm install
       - run: |
           npm run all
   integration_test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: ./
         id: newline
         with: