CLISP-HEAD fails to build on OSX

```
Extracting archive:/Users/runner/.roswell/archives/clisp-23.2.21-x86-64-darwin-binary.tar.bz2
+ ros use clisp-head
dyld[5144]: Library not loaded: '/usr/local/opt/libunistring/lib/libunistring.2.dylib'
Referenced from: '/Users/runner/.roswell/impls/x86-64/darwin/clisp-head/23.2.21/lib/clisp-23.2.21/base/lisp.run'
Reason: tried: '/usr/local/opt/libunistring/lib/libunistring.2.dylib' (no such file), '/usr/local/lib/libunistring.2.dylib' (no such file), '/usr/lib/libunistring.2.dylib' (no such file), '/usr/local/Cellar/libunistring/1.1/lib/libunistring.2.dylib' (no such file), '/usr/local/lib/libunistring.2.dylib' (no such file), '/usr/lib/libunistring.2.dylib' (no such file)
Error: unable to use 'clisp-head'
```

Roswell version: v23.10.14.114

The issue shows a missing libunistring library on macOS. Look at the GitHub Action workflow files in the repository, likely in .github/workflows/, to see how Roswell and CLISP are installed. Check the Roswell installation script or the setup-lisp action code for dependency handling. The fix may involve ensuring libunistring is installed via Homebrew before building CLISP. Test by modifying the action to include 'brew install libunistring' or adjusting the Roswell command.

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