Bump importmap-rails from 2.2.0 to 2.2.2

Bumps [importmap-rails](https://github.com/rails/importmap-rails) from 2.2.0 to 2.2.2.
- [Release notes](https://github.com/rails/importmap-rails/releases)
- [Commits](rails/importmap-rails@v2.2.0...v2.2.2)

---
updated-dependencies:
- dependency-name: importmap-rails
  dependency-version: 2.2.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -175,7 +175,7 @@ GEM
       mini_magick (>= 4.9.5, < 6)
       ruby-vips (>= 2.0.17, < 3)
     image_size (3.4.0)
-    importmap-rails (2.2.0)
+    importmap-rails (2.2.2)
       actionpack (>= 6.0.0)
       activesupport (>= 6.0.0)
       railties (>= 6.0.0)
@@ -305,7 +305,7 @@ GEM
       nio4r (~> 2.0)
     raabro (1.4.0)
     racc (1.8.1)
-    rack (3.1.16)
+    rack (3.2.0)
     rack-session (2.1.1)
       base64 (>= 0.1.0)
       rack (>= 3.0.0)