Upgrade EasyMDE to 2.16.1 (go-gitea#18278)

Author: wxiaoguang

package.json

@@ -12,7 +12,7 @@
     "codemirror": "5.64.0",
     "css-loader": "6.5.1",
     "dropzone": "6.0.0-beta.2",
-    "easymde": "2.15.0",
+    "easymde": "2.16.1",
     "esbuild-loader": "2.16.0",
     "escape-goat": "4.0.0",
     "fast-glob": "3.2.7",