Update jekyll version in lockfile

Author: c00kiemon5ter

Gemfile.lock

@@ -6,7 +6,7 @@ GEM
     colorator (1.1.0)
     ffi (1.9.25)
     forwardable-extended (2.6.0)
-    jekyll (3.4.3)
+    jekyll (~> 3.6.3)
       addressable (~> 2.4)
       colorator (~> 1.0)
       jekyll-sass-converter (~> 1.0)