Docs: Fix the link to feature gates documentation

The link to feature gates documentation is pointing to the
feature-gates.md in master-commandline-reference.html and
worker-commandline-reference.html, it should be updated to
linking html file.

Signed-off-by: joehuang <joehuang.sweden@gmail.com>

docs/Gemfile

@@ -29,7 +29,3 @@ 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

@@ -29,11 +29,6 @@ kramdown:
 remote_theme: rundocs/jekyll-rtd-theme@v2.0.10
 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

docs/reference/master-commandline-reference.md

@@ -33,8 +33,7 @@ Print version and exit.
 ### -feature-gates
 
 The `-feature-gates` flag is used to enable or disable non GA features.
-The list of available feature gates can be found in the [feature gates
-documentation](feature-gates.md).
+The list of available feature gates can be found in the [feature gates documentation](feature-gates.md).
 
 Example:
 

docs/reference/worker-commandline-reference.md

@@ -33,8 +33,7 @@ Print version and exit.
 ### -feature-gates
 
 The `-feature-gates` flag is used to enable or disable non GA features.
-The list of available feature gates can be found in the [feature gates
-documentation](../feature-gates.md).
+The list of available feature gates can be found in the [feature gates documentation](feature-gates.md).
 
 Example: