Update dependency marked to v15

Author: renovate[bot]

Diff for: package.json

@@ -30,7 +30,7 @@
     "@angular/router": "^18.0.0",
     "@fontsource/lato": "^5.0.21",
     "front-matter": "^4.0.2",
-    "marked": "^5.0.2",
+    "marked": "^15.0.0",
     "marked-gfm-heading-id": "^3.1.0",
     "marked-highlight": "^2.0.1",
     "marked-mangle": "^1.1.7",