Update actions/checkout action to v3.0.2

Author: renovate-bot

.github/workflows/ci.yml

@@ -15,7 +15,7 @@ jobs:
       fail-fast: false
     steps:
       - name: Checkout current branch
-        uses: actions/[email protected].1
+        uses: actions/[email protected].2
         with:
           fetch-depth: 0
       - name: Setup Scala and Java
@@ -34,7 +34,7 @@ jobs:
         scala: ['2.11.12', '2.12.15', '2.13.7', '3.1.0']
     steps:
       - name: Checkout current branch
-        uses: actions/[email protected].1
+        uses: actions/[email protected].2
         with:
           fetch-depth: 0
       - name: Setup Scala and Java
@@ -52,7 +52,7 @@ jobs:
     if: github.event_name != 'pull_request'
     steps:
       - name: Checkout current branch
-        uses: actions/[email protected].1
+        uses: actions/[email protected].2
         with:
           fetch-depth: 0
       - name: Setup Scala and Java