fix: changelog page rendered literal **bold** markup instead of bold text

Entries are plain strings with occasional **bold**/`code` spans, never
full markdown — added a tiny inline parser rather than pulling in
react-markdown just for this.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

apps/web/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@epicure/web",
-  "version": "0.12.0",
+  "version": "0.12.1",
   "private": true,
   "scripts": {
     "dev": "next dev",