security fix

Author: AGulev

Gemfile.lock

@@ -212,7 +212,7 @@ GEM
       gemoji (>= 3, < 5)
       html-pipeline (~> 2.2)
       jekyll (>= 3.0, < 5.0)
-    json (2.18.1)
+    json (2.19.3)
     kramdown (2.4.0)
       rexml
     kramdown-parser-gfm (1.1.0)