build(deps-dev): bump bigdecimal from 3.1.8 to 3.1.9 (#36548)

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>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Gemfile.lock

@@ -5,7 +5,7 @@ GEM
       public_suffix (>= 2.0.2, < 7.0)
     ast (2.4.2)
     base64 (0.2.0)
-    bigdecimal (3.1.8)
+    bigdecimal (3.1.9)
     chunky_png (1.4.0)
     colorator (1.1.0)
     commonmarker (0.23.11)