feat(homebrew): add Linux ARM64 to the tap formula and release automation

Readme.adoc

@@ -80,7 +80,7 @@ so they're unaffected) since it isn't signed/notarized yet:
 $ xattr -d com.apple.quarantine /usr/local/bin/lc
 ----
 
-=== Homebrew (macOS Apple Silicon, Linux x86_64)
+=== Homebrew (macOS Apple Silicon, Linux x86_64, Linux ARM64)
 
 [source,sh]
 ----
@@ -366,7 +366,7 @@ $ cd app
 $ mise exec -- env MIX_ENV=prod BURRITO_TARGET=<target> mix release lc
 ----
 
-`<target>` is one of `macos_aarch64`, `linux_x86_64`, or `windows_x86_64`.
+`<target>` is one of `macos_aarch64`, `linux_x86_64`, `linux_aarch64`, or `windows_x86_64`.
 
 === Build the container
 

ci/bump_homebrew_formula.rb

@@ -37,7 +37,7 @@
 version_file = File.join(File.dirname(formula_path), ".version")
 content = File.read(formula_path)
 
-%w[macos_aarch64 linux_x86_64].each do |target|
+%w[macos_aarch64 linux_x86_64 linux_aarch64].each do |target|
   asset = "lc_#{target}.tar.gz"
   sha = sha256sums.fetch(asset) { abort "No checksum found for #{asset} in #{sha256sums_path}" }