build(deps-dev): bump bigdecimal in /Library/Homebrew

Bumps [bigdecimal](https://github.com/ruby/bigdecimal) from 3.1.8 to 3.1.9.
- [Release notes](https://github.com/ruby/bigdecimal/releases)
- [Changelog](https://github.com/ruby/bigdecimal/blob/master/CHANGES.md)
- [Commits](https://github.com/ruby/bigdecimal/compare/v3.1.8...v3.1.9)

---
updated-dependencies:
- dependency-name: bigdecimal
  dependency-type: indirect
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Library/Homebrew/Gemfile.lock

@@ -4,7 +4,7 @@ GEM
     addressable (2.8.7)
       public_suffix (>= 2.0.2, < 7.0)
     ast (2.4.2)
-    bigdecimal (3.1.8)
+    bigdecimal (3.1.9)
     bindata (2.5.0)
     coderay (1.1.3)
     concurrent-ruby (1.3.4)
@@ -148,7 +148,6 @@ GEM
 
 PLATFORMS
   aarch64-linux
-  arm-linux
   arm64-darwin
   x86_64-darwin
   x86_64-linux