Build(deps): Bump sprockets-rails from 3.2.1 to 3.2.2

Bumps [sprockets-rails](https://github.com/rails/sprockets-rails) from 3.2.1 to 3.2.2.
- [Release notes](https://github.com/rails/sprockets-rails/releases)
- [Commits](rails/sprockets-rails@v3.2.1...v3.2.2)

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

Gemfile.lock

@@ -395,7 +395,7 @@ GEM
     sprockets (3.7.2)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
-    sprockets-rails (3.2.1)
+    sprockets-rails (3.2.2)
       actionpack (>= 4.0)
       activesupport (>= 4.0)
       sprockets (>= 3.0.0)