chore(deps): update actions/checkout action to v3 (#447)

Co-authored-by: Grant Timmerman <[email protected]>
Co-authored-by: gcf-merge-on-green[bot] <60162190+gcf-merge-on-green[bot]@users.noreply.github.com>

Author: 3 people

.github/workflows/conformance.yml

@@ -10,7 +10,7 @@ jobs:
         runtime: ['nodejs10', 'nodejs12', 'nodejs14', 'nodejs16']
     steps:
     - name: Checkout code
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
 
     - name: Setup Go
       uses: actions/setup-go@v3

.github/workflows/docs.yml

@@ -8,7 +8,7 @@ jobs:
   docs:
     runs-on: ubuntu-18.04
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - name: Setup Node.js
       uses: actions/setup-node@v3
       with:

.github/workflows/lint.yml

@@ -8,7 +8,7 @@ jobs:
   lint:
     runs-on: ubuntu-18.04
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - name: Setup Node.js
       uses: actions/setup-node@v3
     - name: Install dependencies

.github/workflows/publish.yml

@@ -6,7 +6,7 @@ jobs:
   publish-to-npm:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
         with:
           node-version: 14

.github/workflows/unit.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ${{ matrix.platform }}
     steps:
     - name: Checkout
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
     - name: Use Node.js ${{ matrix.node-version }}
       uses: actions/setup-node@v3
       with: