fix: update links in release notes for consistency

Author: hannesrudolph

docs/update-notes/v3.21.0.mdx

@@ -2,9 +2,9 @@
 
 This release launches the Roo Marketplace, adds support for the latest Gemini 2.5 models, and introduces Excel file support along with numerous improvements and fixes.
 
-## [Roo Marketplace Launch](/docs/features/marketplace)
+## [Roo Marketplace Launch](/features/marketplace)
 
-We're excited to announce the official launch of the [Roo Marketplace](/docs/features/marketplace) ([#4788](https://github.com/RooCodeInc/Roo-Code/pull/4788)):
+We're excited to announce the official launch of the [Roo Marketplace](/features/marketplace) ([#4788](https://github.com/RooCodeInc/Roo-Code/pull/4788)):
 
 - **Discover Great MCPs and Modes**: Browse and install community-created Model Context Protocol servers and custom modes directly from within Roo Code
 - **Seamless Integration**: The marketplace is now available to all users without needing experimental features

docs/update-notes/v3.21.mdx

@@ -2,9 +2,9 @@
 
 This release launches the Roo Marketplace, adds support for the latest Gemini 2.5 models, and introduces Excel file support along with numerous improvements and fixes.
 
-## [Roo Marketplace Launch](/docs/features/marketplace)
+## [Roo Marketplace Launch](/features/marketplace)
 
-We're excited to announce the official launch of the [Roo Marketplace](/docs/features/marketplace) ([#4788](https://github.com/RooCodeInc/Roo-Code/pull/4788)):
+We're excited to announce the official launch of the [Roo Marketplace](/features/marketplace) ([#4788](https://github.com/RooCodeInc/Roo-Code/pull/4788)):
 
 - **Discover Great MCPs and Modes**: Browse and install community-created Model Context Protocol servers and custom modes directly from within Roo Code
 - **Seamless Integration**: The marketplace is now available to all users without needing experimental features