Auto merge of rust-lang#14090 - MariaSolOs:regions, r=Veykril

Unify language configuration folding markers with server behaviour

Fixes rust-lang#14089.

Author: bors

editors/code/language-configuration.json

@@ -35,8 +35,8 @@
     },
     "folding": {
         "markers": {
-            "start": "^\\s*//\\s*#?region\\b",
-            "end": "^\\s*//\\s*#?endregion\\b"
+            "start": "^\\s*// region:\\b",
+            "end": "^\\s*// endregion\\b"
         }
     }
 }