Merge pull request #89 from fluent/dependabot/github_actions/actions/checkout-3

Bump actions/checkout from 2 to 3

Author: ashie

.github/workflows/linux.yml

@@ -22,7 +22,7 @@ jobs:
 
     name: Ruby ${{ matrix.ruby }} unit testing on ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - name: Install dependencies
       run: sudo apt-get install libsnappy-dev libzstd-dev
     - uses: ruby/setup-ruby@v1