CI: upgrade checkout action

Author: System-Glitch

.github/workflows/test.yml

@@ -16,7 +16,7 @@ jobs:
       matrix:
         go: ["1.24", "1.25"]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: actions/setup-go@v6
         with:
           go-version: ${{ matrix.go }}
@@ -32,7 +32,7 @@ jobs:
     name: Lint
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: actions/setup-go@v6
         with:
           go-version: "1.25"