Update actions/checkout version in initial workflow template

Author: getty104

src/commands/init.ts

@@ -24,7 +24,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 5
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - uses: increments/qiita-cli/actions/publish@v1