GitHub Actions checkout v2 (ExpediaGroup#536)

Author: sullis

.github/workflows/pr-check.yml

@@ -14,7 +14,7 @@ jobs:
         java: [ 8, 11.0.x ]
 
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v2
 
       - name: Set up Java ${{ matrix.java }}
         uses: actions/setup-java@v1

.github/workflows/publish-docs.yml

@@ -14,13 +14,13 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v2
 
     - name: Use Node.js 12
       uses: actions/setup-node@v1
       with:
         node-version: 12
-       
+
     - name: Run npm commands
       if: github.repository == 'ExpediaGroup/graphql-kotlin'
       run: |