Bump actions/checkout from 5 to 6 (#10)

Author: dependabot[bot]

.github/workflows/ci.yaml

@@ -12,7 +12,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - uses: actions-rust-lang/setup-rust-toolchain@v1
       with:
         toolchain: 1.84.1
@@ -49,7 +49,7 @@ jobs:
       packages: write
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - uses: actions-rust-lang/setup-rust-toolchain@v1
       with:
         toolchain: 1.84.1