Merge pull request #351 from michimani/renovate/actions-checkout-6.x

chore(deps): update actions/checkout action to v6

Author: michimani

.github/workflows/onlytest.yml

@@ -26,7 +26,7 @@ jobs:
           go-version: "1.26"
 
       - name: Check out code into the Go module directory
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Get dependencies
         run: go install

.github/workflows/tagpr.yml

@@ -10,7 +10,7 @@ jobs:
       contents: write
       pull-requests: write
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: Songmu/tagpr@v1
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}