chore: update to marked@12

Author: lucacasonato

deno.json

@@ -4,7 +4,7 @@
   "exports": "./mod.ts",
   "imports": {
     "emoji": "jsr:@denosaurs/[email protected]",
-    "marked": "npm:marked@^11.1",
+    "marked": "npm:marked@^12",
     "github-slugger": "npm:github-slugger@^2.0",
     "marked-alert": "npm:marked-alert@^2.0",
     "marked-footnote": "npm:marked-footnote@^1.2",