Rename homebrew formula subdirctory

[sharkAndshark]

Rename hombrew formula directory from homebrew-formula to HomebrewFormula based on the homebrew doc.

[sharkAndshark]

I made a test on my M1 Mac. I could install martin on it after this change.
Before this change:

brew tap maplibre/martin https://github.com/maplibre/martin.git
brew install maplibre/martin/martin
Warning: No available formula or cask with the name "maplibre/martin/martin".

After this change:

brew tap maplibre/martin https://github.com/maplibre/martin.git
brew install maplibre/martin/martin
==> Fetching dependencies for maplibre/martin/martin: openssl@3
==> Fetching openssl@3
==> Downloading https://ghcr.io/v2/homebrew/core/openssl/3/manifests/3.1.3
######################################################################### 100.0%
==> Downloading https://ghcr.io/v2/homebrew/core/openssl/3/blobs/sha256:297a2c1c
######################################################################### 100.0%
==> Fetching maplibre/martin/martin
...
==> Summary
🍺  /opt/homebrew/Cellar/martin/0.8.7: 3 files, 13.2MB, built in 3 seconds
==> Running `brew cleanup martin`...
Disable this behaviour by setting HOMEBREW_NO_INSTALL_CLEANUP.
Hide these hints with HOMEBREW_NO_ENV_HINTS (see `man brew`).
==> Caveats
==> martin
Martin requires a database connection string.
It can be passed as a command-line argument or as a DATABASE_URL environment variable.
  martin postgres://postgres@localhost/db

[sharkAndshark]

Hi @nyurik Have a good day :)
Any idea about automatically update the version number in formula in ci. How about shell command to retrieve version info from cargo.toml?

[nyurik]

Thanks, looks good! I keep thinking if it would make sense to create a separate repository just for this, and automate its update with a github action... But that would be a separate PR