update to use hash

Author: joshuadavidthomas

.github/workflows/zizmor.yml

@@ -20,7 +20,7 @@ jobs:
           persist-credentials: false
 
       - name: Install uv
-        uses: astral-sh/setup-uv@v6
+        uses: astral-sh/setup-uv@c7f87aa956e4c323abf06d5dec078e358f6b4d04
         with:
           enable-cache: true