chore(deps): update actions/checkout action to v6 (#124)

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

Author: renovate[bot]

.github/workflows/build-test-release.yml

@@ -31,7 +31,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Install the latest version of uv
         uses: astral-sh/setup-uv@v7
@@ -66,7 +66,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Install the latest version of uv
         uses: astral-sh/setup-uv@v7