Bump rinku from 2.0.5 to 2.0.6

Bumps [rinku](https://github.com/vmg/rinku) from 2.0.5 to 2.0.6.
- [Release notes](https://github.com/vmg/rinku/releases)
- [Commits](vmg/rinku@v2.0.5...v2.0.6)

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

Gemfile

@@ -16,7 +16,7 @@ gem 'bootsnap', '>= 1.3', require: false # Optimize Rails boot time
 # TEXT PROCESSING
 gem 'kramdown', '~> 1.17' # Markdown <> HTML
 gem 'loofah', '~> 2.2' # HTML sanitizer
-gem 'rinku', '~> 2.0.5' # Autolink
+gem 'rinku', '~> 2.0.6' # Autolink
 
 # SERVER
 gem 'lograge', '~> 0.11' # Less verbose Rails log in production

Gemfile.lock

@@ -644,7 +644,7 @@ GEM
       mime-types (>= 1.16, < 4.0)
       netrc (~> 0.8)
     retriable (3.1.2)
-    rinku (2.0.5)
+    rinku (2.0.6)
     rspec-activemodel-mocks (1.1.0)
       activemodel (>= 3.0)
       activesupport (>= 3.0)
@@ -841,7 +841,7 @@ DEPENDENCIES
   rails-i18n (~> 5.1)
   rb-readline (~> 0.5)
   redis-activesupport (~> 5.0)
-  rinku (~> 2.0.5)
+  rinku (~> 2.0.6)
   rspec-activemodel-mocks (~> 1.1)
   rspec-rails (~> 3.8)
   rspec_junit_formatter (~> 0.4)