chore(jekyll): downgrade redcarpet@3.3.3

fix efcl#132

Author: azu

Gemfile

@@ -1,7 +1,7 @@
 source 'https://rubygems.org'
 gem 'jekyll', '~> 2.1'
-gem 'redcarpet'
+gem 'redcarpet', '3.3.3'
 gem 'jemoji'
 gem 'jekyll-sitemap'
 gem 'rake'
-gem 'rake-jekyll'
+gem 'rake-jekyll'

Gemfile.lock

@@ -81,7 +81,7 @@ GEM
     rb-fsevent (0.9.7)
     rb-inotify (0.9.7)
       ffi (>= 0.5.0)
-    redcarpet (3.3.4)
+    redcarpet (3.3.3)
     safe_yaml (1.0.4)
     sass (3.4.21)
     sawyer (0.7.0)
@@ -103,7 +103,7 @@ DEPENDENCIES
   jemoji
   rake
   rake-jekyll
-  redcarpet
+  redcarpet (= 3.3.3)
 
 BUNDLED WITH
-   1.10.3
+   1.11.2