build(deps): bump importmap-rails from 1.2.1 to 1.2.3

Bumps [importmap-rails](https://github.com/rails/importmap-rails) from 1.2.1 to 1.2.3.
- [Release notes](https://github.com/rails/importmap-rails/releases)
- [Commits](rails/importmap-rails@v1.2.1...v1.2.3)

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

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

Gemfile.lock

@@ -143,8 +143,9 @@ GEM
       activesupport (>= 6.1)
     i18n (1.14.1)
       concurrent-ruby (~> 1.0)
-    importmap-rails (1.2.1)
+    importmap-rails (1.2.3)
       actionpack (>= 6.0.0)
+      activesupport (>= 6.0.0)
       railties (>= 6.0.0)
     io-console (0.6.0)
     irb (1.8.3)