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

Author: LINBOT

.github/workflows/go.yml

@@ -20,7 +20,7 @@ jobs:
       id: go
 
     - name: Check out code into the Go module directory
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
 
     - name: Build
       run: go build -v .

.github/workflows/release.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Setup GO
         uses: actions/setup-go@v6
         with: