chore(deps): update actions/checkout action to v5 (#28)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/ci.yml

@@ -15,7 +15,7 @@ jobs:
         python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
 
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
 
     - name: Install uv
       uses: astral-sh/setup-uv@v6

.github/workflows/publish.yml

@@ -19,7 +19,7 @@ jobs:
         python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
 
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
 
     - name: Install uv
       uses: astral-sh/setup-uv@v6
@@ -43,7 +43,7 @@ jobs:
     needs: test
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
 
     - name: Install uv
       uses: astral-sh/setup-uv@v6