Merge pull request #3945 from jupyterhub/dependabot/github_actions/actions/checkout-3

Bump actions/checkout from 2 to 3

.github/workflows/release.yml

@@ -32,7 +32,7 @@ jobs:
   build-release:
     runs-on: ubuntu-20.04
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: actions/setup-python@v2
         with:
           python-version: 3.8
@@ -98,7 +98,7 @@ jobs:
               echo "REGISTRY=localhost:5000/" >> $GITHUB_ENV
           fi
 
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       # Setup docker to build for multiple platforms, see:
       # https://github.com/docker/build-push-action/tree/v2.4.0#usage

.github/workflows/test-docs.yml

@@ -40,7 +40,7 @@ jobs:
   validate-rest-api-definition:
     runs-on: ubuntu-20.04
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: Validate REST API definition
         uses: char0n/swagger-editor-validate@182d1a5d26ff5c2f4f452c43bd55e2c7d8064003
@@ -50,7 +50,7 @@ jobs:
   test-docs:
     runs-on: ubuntu-20.04
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: actions/setup-python@v2
         with:
           python-version: "3.9"

.github/workflows/test-jsx.yml

@@ -32,7 +32,7 @@ jobs:
     timeout-minutes: 5
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: actions/setup-node@v1
         with:
           node-version: "14"

.github/workflows/test.yml

@@ -113,7 +113,7 @@ jobs:
           if [ "${{ matrix.jupyter_server }}" != "" ]; then
               echo "JUPYTERHUB_SINGLEUSER_APP=jupyterhub.tests.mockserverapp.MockServerApp" >> $GITHUB_ENV
           fi
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       # NOTE: actions/setup-node@v1 make use of a cache within the GitHub base
       #       environment and setup in a fraction of a second.
       - name: Install Node v14
@@ -214,7 +214,7 @@ jobs:
     timeout-minutes: 20
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: build images
         run: |