Bump importmap-rails from 2.2.0 to 2.2.1

Bumps [importmap-rails](https://github.com/rails/importmap-rails) from 2.2.0 to 2.2.1.
- [Release notes](https://github.com/rails/importmap-rails/releases)
- [Commits](rails/importmap-rails@v2.2.0...v2.2.1)

---
updated-dependencies:
- dependency-name: importmap-rails
  dependency-version: 2.2.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Gemfile.lock

@@ -162,7 +162,7 @@ GEM
       thor
     i18n (1.14.7)
       concurrent-ruby (~> 1.0)
-    importmap-rails (2.2.0)
+    importmap-rails (2.2.1)
       actionpack (>= 6.0.0)
       activesupport (>= 6.0.0)
       railties (>= 6.0.0)