Bump loofah from 2.2.3 to 2.9.1

Bumps [loofah](https://github.com/flavorjones/loofah) from 2.2.3 to 2.9.1.
- [Release notes](https://github.com/flavorjones/loofah/releases)
- [Changelog](https://github.com/flavorjones/loofah/blob/main/CHANGELOG.md)
- [Commits](flavorjones/loofah@v2.2.3...v2.9.1)

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

Author: dependabot[bot]

Gemfile.lock

@@ -70,7 +70,7 @@ GEM
     coffee-script-source (1.12.2)
     concurrent-ruby (1.1.5)
     connection_pool (2.2.2)
-    crass (1.0.4)
+    crass (1.0.6)
     debug_inspector (0.0.3)
     erubi (1.8.0)
     erubis (2.7.0)
@@ -102,26 +102,28 @@ GEM
       activerecord
       kaminari-core (= 1.1.1)
     kaminari-core (1.1.1)
-    loofah (2.2.3)
+    loofah (2.9.1)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     mail (2.7.1)
       mini_mime (>= 0.1.1)
     method_source (0.9.2)
     mini_mime (1.0.1)
-    mini_portile2 (2.4.0)
+    mini_portile2 (2.5.0)
     minitest (5.11.3)
     multi_json (1.13.1)
     newrelic_rpm (5.6.0.349)
     nio4r (2.3.1)
-    nokogiri (1.10.3)
-      mini_portile2 (~> 2.4.0)
+    nokogiri (1.11.3)
+      mini_portile2 (~> 2.5.0)
+      racc (~> 1.4)
     pg (1.1.3)
     pry (0.12.2)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
     pry-rails (0.3.8)
       pry (>= 0.10.4)
+    racc (1.5.2)
     rack (2.0.7)
     rack-test (0.6.3)
       rack (>= 1.0)