Drop arm musl caveat from Docker documentation (#17111)

This works fine now

```
❯ docker run --rm -it ghcr.io/astral-sh/uv:alpine sh -c "uv python install 3.14"
Installed Python 3.14.2 in 2.77s
 + cpython-3.14.2-linux-aarch64-musl (python3.14)
```
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Zanie Blue 2025-12-12 13:15:15 -06:00 committed by GitHub
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@ -251,17 +251,6 @@ $ docker run -it $(docker build -q .) /bin/bash -c "cowsay -t hello"
ENV UV_TOOL_BIN_DIR=/opt/uv-bin/
```
### Installing Python in ARM musl images
While uv will attempt to [install a compatible Python version](../install-python.md) if no such
version is available in the image, uv does not yet support installing Python for musl Linux on ARM.
For example, if you are using an Alpine Linux base image on an ARM machine, you may need to add it
with the system package manager:
```shell
apk add --no-cache python3~=3.12
```
## Developing in a container
When developing, it's useful to mount the project directory into a container. With this setup,