Bump autoprefixer-rails from 9.8.6.3 to 10.0.0

Bumps [autoprefixer-rails](https://github.com/ai/autoprefixer-rails) from 9.8.6.3 to 10.0.0.
- [Release notes](https://github.com/ai/autoprefixer-rails/releases)
- [Changelog](https://github.com/ai/autoprefixer-rails/blob/master/CHANGELOG.md)
- [Commits](ai/autoprefixer-rails@9.8.6.3...10.0.0)

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

Gemfile.lock

@@ -71,7 +71,7 @@ GEM
       activerecord (>= 3.2, < 7.0)
       rake (>= 10.4, < 14.0)
     ast (2.4.1)
-    autoprefixer-rails (9.8.6.3)
+    autoprefixer-rails (10.0.0)
       execjs
     aws-eventstream (1.1.0)
     aws-partitions (1.367.0)