ci: Bump actions' versions

Author: madhead

.github/workflows/build.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Code Checkout
-        uses: actions/checkout@v1
+        uses: actions/checkout@v3
       - name: Setup Ruby
         uses: ruby/setup-ruby@v1
         with:

.github/workflows/code.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Code Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         with:
           persist-credentials: false
           fetch-depth: 0