Use jekyll-commonmark for auto URL link (#673)

Fixes GH-672.

Author: kou

Gemfile

@@ -20,13 +20,14 @@ ruby RUBY_VERSION
 
 gem "base64"
 gem "csv"
-gem "jekyll", "4.3.3"
+gem "jekyll", "4.4.1"
 gem "rake"
 gem "tzinfo-data", platforms: [:mingw, :mswin, :x64_mingw, :jruby]
 gem "webrick"
 
 group :jekyll_plugins do
-  gem "jekyll-feed", "~> 0.6"
+  gem "jekyll-commonmark"
+  gem "jekyll-feed"
   gem "jekyll-jupyter-notebook"
   gem "jekyll-seo-tag"
 end

_config.yml

@@ -19,9 +19,14 @@ repository: https://github.com/apache/arrow
 excerpt_separator: </p>
 timezone: America/New_York
 
-kramdown:
-  input: GFM
-  syntax_highlighter: rouge
+markdown: CommonMark
+commonmark:
+  options:
+    - FOOTNOTES
+  extensions:
+    - autolink
+    - strikethrough
+    - table
 
 include:
   - .asf.yaml