Update kramdown (CVE-2021-28834)

Author: Vidas P

Gemfile

@@ -29,7 +29,7 @@ gem 'jquery-rails', '~> 4.4.0'
 gem 'json', '~> 2.3.1'
 gem 'jsonpath', '~> 1.0.6'
 gem 'kaminari', '~> 1.2.1'
-gem 'kramdown', '~> 2.3.0'
+gem 'kramdown', '~> 2.3.1'
 gem 'liquid', '~> 4.0.3'
 gem 'loofah', '~> 2.8.0'
 gem 'mini_magick', '~> 4.11.0'

Gemfile.lock

@@ -236,7 +236,7 @@ GEM
       activerecord
       kaminari-core (= 1.2.1)
     kaminari-core (1.2.1)
-    kramdown (2.3.0)
+    kramdown (2.3.1)
       rexml
     kwalify (0.7.2)
     launchy (2.5.0)
@@ -372,7 +372,7 @@ GEM
     responders (3.0.1)
       actionpack (>= 5.0)
       railties (>= 5.0)
-    rexml (3.2.4)
+    rexml (3.2.5)
     rr (1.1.2)
     rspec (3.9.0)
       rspec-core (~> 3.9.0)
@@ -518,7 +518,7 @@ DEPENDENCIES
   jsonpath (~> 1.0.6)
   jwt (~> 2.2.2)
   kaminari (~> 1.2.1)
-  kramdown (~> 2.3.0)
+  kramdown (~> 2.3.1)
   letter_opener_web (~> 1.4.0)
   libyear-bundler (~> 0.5.3)
   liquid (~> 4.0.3)