Bump jbuilder from 2.7.0 to 2.8.0 (forem#1474)

Bumps [jbuilder](https://github.com/rails/jbuilder) from 2.7.0 to 2.8.0.
- [Release notes](https://github.com/rails/jbuilder/releases)
- [Changelog](https://github.com/rails/jbuilder/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rails/jbuilder/commits)

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

Gemfile

@@ -52,7 +52,7 @@ gem "honeycomb-rails"
 gem "html_truncator", "~> 0.4"
 gem "httparty", "~> 0.16"
 gem "inline_svg", "~> 1.3"
-gem "jbuilder", "~> 2.7"
+gem "jbuilder", "~> 2.8"
 gem "jquery-rails", "~> 4.3"
 gem "kaminari", "~> 1.1"
 gem "libhoney", "~> 1.10"

Gemfile.lock

@@ -527,7 +527,7 @@ GEM
     io-like (0.3.0)
     ipaddress (0.8.3)
     jaro_winkler (1.5.2)
-    jbuilder (2.7.0)
+    jbuilder (2.8.0)
       activesupport (>= 4.2.0)
       multi_json (>= 1.2)
     jmespath (1.4.0)
@@ -981,7 +981,7 @@ DEPENDENCIES
   html_truncator (~> 0.4)
   httparty (~> 0.16)
   inline_svg (~> 1.3)
-  jbuilder (~> 2.7)
+  jbuilder (~> 2.8)
   jquery-rails (~> 4.3)
   kaminari (~> 1.1)
   launchy (~> 2.4)