Bump rails-html-sanitizer from 1.4.2 to 1.4.3 (#2434)

Bumps [rails-html-sanitizer](https://github.com/rails/rails-html-sanitizer) from 1.4.2 to 1.4.3.
- [Release notes](https://github.com/rails/rails-html-sanitizer/releases)
- [Changelog](https://github.com/rails/rails-html-sanitizer/blob/master/CHANGELOG.md)
- [Commits](rails/rails-html-sanitizer@v1.4.2...v1.4.3)

---
updated-dependencies:
- dependency-name: rails-html-sanitizer
  dependency-type: indirect
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Gemfile.lock

@@ -278,7 +278,7 @@ GEM
     listen (3.5.0)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
-    loofah (2.16.0)
+    loofah (2.18.0)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     lumberjack (1.2.8)
@@ -376,7 +376,7 @@ GEM
     rails-dom-testing (2.0.3)
       activesupport (>= 4.2.0)
       nokogiri (>= 1.6)
-    rails-html-sanitizer (1.4.2)
+    rails-html-sanitizer (1.4.3)
       loofah (~> 2.3)
     rails4-autocomplete (1.1.1)
       rails (>= 3.0)