[ADM] Fix GitHub security issue (#168)

Author: PabloRMira

docs/Gemfile

@@ -5,4 +5,4 @@ gem 'github-pages', group: :jekyll_plugins
 # Added at 2019-11-25 10:11:40 -0800 by jhoward:
 gem "nokogiri", "< 1.10.9"
 gem "jekyll", ">= 3.7"
-gem "kramdown", ">= 2.3.0"
+gem "kramdown", ">= 2.3.1"

docs/Gemfile.lock

@@ -67,7 +67,7 @@ GEM
       jekyll-theme-time-machine (= 0.1.1)
       jekyll-titles-from-headings (= 0.5.3)
       jemoji (= 0.11.1)
-      kramdown (= 2.3.0)
+      kramdown (= 2.3.1)
       kramdown-parser-gfm (= 1.1.0)
       liquid (= 4.0.3)
       mercenary (~> 0.3)
@@ -192,7 +192,7 @@ GEM
       gemoji (~> 3.0)
       html-pipeline (~> 2.2)
       jekyll (>= 3.0, < 5.0)
-    kramdown (2.3.0)
+    kramdown (2.3.1)
       rexml
     kramdown-parser-gfm (1.1.0)
       kramdown (~> 2.0)
@@ -254,7 +254,7 @@ PLATFORMS
 DEPENDENCIES
   github-pages
   jekyll (>= 3.7)
-  kramdown (>= 2.3.0)
+  kramdown (>= 2.3.1)
   nokogiri (< 1.10.9)
 
 BUNDLED WITH