chore(deps): update ghcr.io/astral-sh/uv docker tag to v0.5.20

Author: renovate[bot]

.devcontainer/Dockerfile

@@ -1,5 +1,5 @@
 FROM mcr.microsoft.com/vscode/devcontainers/python:3.13
-COPY --from=ghcr.io/astral-sh/uv:0.5.18 /uv /uvx /bin/
+COPY --from=ghcr.io/astral-sh/uv:0.5.20 /uv /uvx /bin/
 ARG USERNAME=vscode
 
 RUN apt-get update && \