Release 0.9.1 (#118)

This release includes:
- Add support for configuring user agent prefix
- Avoid allocating in pre_exec closure
- Don't swallow text from nested errors
- Consistently accept --debug in client

Assisted-by: OpenCode (Sonnet 4)

Signed-off-by: Colin Walters <walters@verbum.org>

Author: cgwalters

Cargo.toml

@@ -5,7 +5,7 @@ license = "MIT OR Apache-2.0"
 name = "containers-image-proxy"
 readme = "README.md"
 repository = "https://github.com/containers/containers-image-proxy-rs"
-version = "0.9.0"
+version = "0.9.1"
 rust-version = "1.70.0"
 
 [dependencies]