fix: Extractors & Post Processors broken links (#974)

Author: bonswouar

src/content/docs/ruby-gem/how-to/advanced-content-extraction.mdx

@@ -7,8 +7,8 @@ While basic selectors are straightforward, you can achieve very precise content
 
 ## Extractors
 
-Learn how to extract specific attributes (like `src` for images) or static values. See [Extractors](/ruby-gem/reference/selectors/extractors).
+Learn how to extract specific attributes (like `src` for images) or static values. See [Extractors](/ruby-gem/reference/selectors/#extractors).
 
 ## Post Processors
 
-Manipulate extracted text, sanitize HTML, convert Markdown, or apply custom logic. See [Post Processors](/ruby-gem/reference/selectors/post-processors).
+Manipulate extracted text, sanitize HTML, convert Markdown, or apply custom logic. See [Post Processors](/ruby-gem/reference/selectors/#post-processors).