Changes whitelist to allowlist

doc/user/markdown.md

@@ -1017,7 +1017,7 @@ You can also use raw HTML in your Markdown, and it will usually work pretty well
 
 See the documentation for HTML::Pipeline's [SanitizationFilter](https://github.com/jch/html-pipeline/blob/v2.12.3/lib/html/pipeline/sanitization_filter.rb#L42)
 class for the list of allowed HTML tags and attributes. In addition to the default
-`SanitizationFilter` whitelist, GitLab allows `span`, `abbr`, `details` and `summary` elements.
+`SanitizationFilter` allowlist, GitLab allows `span`, `abbr`, `details` and `summary` elements.
 
 ```html
 <dl>