Update changelog.mdx

Co-Authored-By: mintlify[bot] <109931778+mintlify[bot]@users.noreply.github.com>

Author: Gerome-Elassaad

changelog.mdx

@@ -26,11 +26,15 @@ New releases and improvements
 
 </Update>
 
-<Update label="December 19, 2025" tags={["Improvements"]} rss={{ title: "Stability improvements and provider configuration enhancements" }}>
-  ## Improvements
+## December 19, 2025
+
+<Update tags={["Improvements"]}>
+
+### Improvements
+
+- Version bump with stability improvements
+- Provider configuration enhancements
 
-  * Version bump with stability improvements
-  * Provider configuration enhancements
 </Update>
 
 <Update label="December 14, 2025" tags={["New releases", "Improvements"]} rss={{ title: "GPT-5 and Claude Opus 4.5 model support, Electron standardization, and bundle optimization" }}>