set uv action pin

Author: hobu

.github/workflows/build.yml

@@ -37,7 +37,7 @@ jobs:
       uses: actions/checkout@v4
 
     - name: Install uv
-      uses: astral-sh/setup-uv@v8
+      uses: astral-sh/setup-uv@v8.3.1
       with:
         enable-cache: true