fix: bump actions/checkout from 4 to 6

fix: bump actions/checkout from 4 to 6

Author: milsman2

.github/workflows/cache-uv-build.yaml

@@ -18,7 +18,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Install uv
         uses: astral-sh/setup-uv@v6