Build(deps): Bump json from 2.7.5 to 2.8.1

Bumps [json](https://github.com/ruby/json) from 2.7.5 to 2.8.1.
- [Release notes](https://github.com/ruby/json/releases)
- [Changelog](https://github.com/ruby/json/blob/master/CHANGES.md)
- [Commits](ruby/json@v2.7.5...v2.8.1)

---
updated-dependencies:
- dependency-name: json
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Gemfile

@@ -101,7 +101,7 @@ gem 'htmlentities', '~> 4.3.0'
 gem 'icalendar', '~> 2.10.3'
 gem 'jquery-rails', '~> 4.6.0'
 gem 'jquery-ui-rails', '~> 6.0.0'
-gem 'json', '~> 2.7.5'
+gem 'json', '~> 2.8.1'
 gem 'holidays', '~> 8.8.0'
 gem 'iso_country_codes', '~> 0.7.8'
 gem 'mail', '~> 2.8.1'

Gemfile.lock

@@ -289,7 +289,7 @@ GEM
       thor (>= 0.14, < 2.0)
     jquery-ui-rails (6.0.1)
       railties (>= 3.2.16)
-    json (2.7.5)
+    json (2.8.1)
     jwt (2.7.1)
     language_server-protocol (3.17.0.3)
     launchy (3.0.1)
@@ -610,7 +610,7 @@ DEPENDENCIES
   iso_country_codes (~> 0.7.8)
   jquery-rails (~> 4.6.0)
   jquery-ui-rails (~> 6.0.0)
-  json (~> 2.7.5)
+  json (~> 2.8.1)
   launchy (< 3.1.0)
   locale (~> 2.1.4)
   mahoro (~> 0.5)