Use boolean as type of StandardLibrary key in clangd schema (SchemaStore#4592)

Author: HighCommander4

src/schemas/json/clangd.json

@@ -515,7 +515,8 @@
         },
         "StandardLibrary": {
           "description": "Whether to index a standard library\nhttps://clangd.llvm.org/config.html#standardlibrary",
-          "enum": ["Yes", "No"]
+          "type": "boolean",
+          "default": true
         }
       },
       "additionalProperties": false