Bump font-awesome-sass from 6.4.0 to 6.4.2

Bumps [font-awesome-sass](https://github.com/FortAwesome/font-awesome-sass) from 6.4.0 to 6.4.2.
- [Release notes](https://github.com/FortAwesome/font-awesome-sass/releases)
- [Commits](https://github.com/FortAwesome/font-awesome-sass/commits)

---
updated-dependencies:
- dependency-name: font-awesome-sass
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Gemfile

@@ -41,7 +41,7 @@ gem 'listen', '~> 3.8.0', group: :development
 
 gem 'bootstrap', '~> 5.2.3'
 gem "bootstrap_form", "~> 5.2"
-gem 'font-awesome-sass', '~> 6.4.0'
+gem 'font-awesome-sass', '~> 6.4.2'
 
 # Use Diffy for showing translation diffs
 gem 'diffy'

Gemfile.lock

@@ -109,7 +109,7 @@ GEM
       ruby2_keywords (>= 0.0.4)
     faraday-net_http (3.0.2)
     ffi (1.15.5)
-    font-awesome-sass (6.4.0)
+    font-awesome-sass (6.4.2)
       sassc (~> 2.0)
     globalid (1.1.0)
       activesupport (>= 5.0)
@@ -300,7 +300,7 @@ DEPENDENCIES
   devise (~> 4.8.0)
   diff-lcs
   diffy
-  font-awesome-sass (~> 6.4.0)
+  font-awesome-sass (~> 6.4.2)
   jbuilder (~> 2.11.3)
   jquery-rails (~> 4.5.1)
   listen (~> 3.8.0)