Fix captureMetaData casing (#773)

Author: edwardpeek-crown-public

docs/v4/2.XMLparseOptions.md

@@ -1001,9 +1001,9 @@ const parser = new XMLParser(options);
 const output = parser.parse(xmlDataStr);
 ```
 
-## captureMetadata
+## captureMetaData
 
-If `captureMetadata` is true, then a [Symbol](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Symbol) is added to nodes with metadata about that node.
+If `captureMetaData` is true, then a [Symbol](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Symbol) is added to nodes with metadata about that node.
 
 `XMLParser.getMetaDataSymbol()` will return the symbol.  Being a Symbol, this property
 will not normally appear in, for example, `Object.keys`.