Update dependency codemirror to v6

Author: renovate[bot]

public/package-lock.json

@@ -16,7 +16,7 @@
     "@vuepic/vue-datepicker": "^10.0.0",
     "bootstrap": "^5.3.3",
     "bootswatch": "^5.3.3",
-    "codemirror": "^5.65.15",
+    "codemirror": "^6.0.0",
     "dompurify": "^3.2.3",
     "marked": "^14.1.4",
     "vue": "^3.5.13",