Update dependency codemirror to v6

Author: renovate[bot]

public/package-lock.json

@@ -17,7 +17,7 @@
     "bootstrap": "^5.1.3",
     "bootswatch": "^5.3.1",
     "chart.js": "^4.0.1",
-    "codemirror": "^5.65.15",
+    "codemirror": "^6.0.0",
     "dompurify": "^3.1.6",
     "marked": "^14.0.0",
     "vue": "^3.2.33",