Bump version to v0.4.2 (#6916)

docs/guides/integration/docker.md

@@ -21,7 +21,7 @@ $ docker run ghcr.io/astral-sh/uv --help
 uv builds and publishes the following Docker tags:
 
 - `uv:latest`
-- `uv:{major}.{minor}.{patch}`, e.g., `uv:0.4.1`
+- `uv:{major}.{minor}.{patch}`, e.g., `uv:0.4.2`
 - `uv:{major}.{minor}`, e.g., `uv:0.4` (the latest patch version)
 
 For more details, see the [GitHub Container](https://github.com/astral-sh/uv/pkgs/container/uv)
@@ -59,13 +59,13 @@ Note this requires `curl` to be available.
 In either case, it is best practice to pin to a specific uv version, e.g., with:
 
 ```dockerfile
-COPY --from=ghcr.io/astral-sh/uv:0.4.1 /uv /bin/uv
+COPY --from=ghcr.io/astral-sh/uv:0.4.2 /uv /bin/uv
 ```
 
 Or, with the installer:
 
 ```dockerfile
-ADD https://astral.sh/uv/0.4.1/install.sh /uv-installer.sh
+ADD https://astral.sh/uv/0.4.2/install.sh /uv-installer.sh
 ```
 
 ### Installing a project