Fix the link to feature gates documentation

The link to feature gates documentation is pointing to the
upward folder in master-commandline-reference.md, it should
be updated to linking file in the same folder.

Signed-off-by: joehuang <[email protected]>

Author: ChaoyiHuang

docs/Gemfile

@@ -29,3 +29,7 @@ gem "wdm", "~> 0.1.1", :install_if => Gem.win_platform?
 #gem "kramdown-parser-gfm"
 
 gem "webrick", "~> 1.8"
+
+# render realtive link by plugin
+# https://github.blog/news-insights/product-news/relative-links-for-github-pages/
+gem 'jekyll-relative-links'

docs/_config.yml

@@ -29,6 +29,11 @@ kramdown:
 remote_theme: rundocs/[email protected]
 plugins:
   - jekyll-remote-theme
+  - jekyll-relative-links
+
+relative_links:
+  enabled:     true
+  collections: true
 
 # Exclude from processing.
 # The following items will not be processed, by default. Create a custom list