Maintenance: Bump autoprefixer-rails from 10.4.2.0 to 10.4.7.0

Bumps [autoprefixer-rails](https://github.com/ai/autoprefixer-rails) from 10.4.2.0 to 10.4.7.0.
- [Release notes](https://github.com/ai/autoprefixer-rails/releases)
- [Changelog](https://github.com/ai/autoprefixer-rails/blob/master/CHANGELOG.md)
- [Commits](https://github.com/ai/autoprefixer-rails/compare/10.4.2.0...10.4.7.0)

Gemfile.lock

@@ -108,7 +108,7 @@ GEM
       ffi (~> 1.14)
       ffi-compiler (~> 1.0)
     ast (2.4.2)
-    autoprefixer-rails (10.4.2.0)
+    autoprefixer-rails (10.4.7.0)
       execjs (~> 2)
     binding_of_caller (1.0.0)
       debug_inspector (>= 0.0.1)