Update ghcr.io/astral-sh/uv Docker tag to v0.6.12

Author: renovate[bot]

Dockerfile

@@ -16,7 +16,7 @@ RUN apt-get update \
 ENV PYTHONUNBUFFERED=1 \
   PYTHONDONTWRITEBYTECODE=1
 
-COPY --from=ghcr.io/astral-sh/uv:0.6.9 /uv /uvx /bin/
+COPY --from=ghcr.io/astral-sh/uv:0.6.12 /uv /uvx /bin/
 
 ENV UV_COMPILE_BYTECODE=1 \
   UV_LINK_MODE=copy