Update default values for XmlReaderSettings (#10028)

- Sort the table alphabetically
- Add missing `CloseInput` property
- Fix link to `DtdProcessing` property: it should point to
  System.Xml.XmlReaderSettings.DtdProcessing.

Author: omajid

xml/System.Xml/XmlReaderSettings.xml

@@ -123,7 +123,9 @@ The following example creates an <xref:System.Xml.XmlReader> that uses an <xref:
 |--------------|-------------------|
 |<xref:System.Xml.XmlReaderSettings.Async%2A>|`false`.|
 |<xref:System.Xml.XmlReaderSettings.CheckCharacters%2A>|`true`.|
+|<xref:System.Xml.XmlReaderSettings.CloseInput%2A>|`false`.|
 |<xref:System.Xml.XmlReaderSettings.ConformanceLevel%2A>|<xref:System.Xml.ConformanceLevel.Document>.|
+|<xref:System.Xml.XmlReaderSettings.DtdProcessing%2A>|<xref:System.Xml.DtdProcessing.Prohibit>|
 |<xref:System.Xml.XmlReaderSettings.IgnoreComments%2A>|`false`.|
 |<xref:System.Xml.XmlReaderSettings.IgnoreProcessingInstructions%2A>|`false`.|
 |<xref:System.Xml.XmlReaderSettings.IgnoreWhitespace%2A>|`false`.|
@@ -132,7 +134,6 @@ The following example creates an <xref:System.Xml.XmlReader> that uses an <xref:
 |<xref:System.Xml.XmlReaderSettings.MaxCharactersFromEntities%2A>|0 (there is no limit on the number of characters that result from expanding entities).|
 |<xref:System.Xml.XmlReaderSettings.MaxCharactersInDocument%2A>|0 (there is no limit on the size of the XML document).|
 |<xref:System.Xml.XmlReaderSettings.NameTable%2A>|`null`.|
-|<xref:System.Xml.XmlTextReader.DtdProcessing%2A>|<xref:System.Xml.DtdProcessing.Prohibit>|
 |<xref:System.Xml.XmlReaderSettings.ProhibitDtd%2A>|`true`. This property is obsolete. Use <xref:System.Xml.XmlTextReader.DtdProcessing%2A> instead. If you had set <xref:System.Xml.XmlReaderSettings.ProhibitDtd%2A> to its default value `true` set <xref:System.Xml.XmlTextReader.DtdProcessing%2A> to `Prohibit`. If you had set <xref:System.Xml.XmlReaderSettings.ProhibitDtd%2A> to `false` set <xref:System.Xml.XmlTextReader.DtdProcessing%2A> to `Parse`.|
 |<xref:System.Xml.XmlReaderSettings.Schemas%2A>|An empty <xref:System.Xml.Schema.XmlSchemaSet> object.|
 |<xref:System.Xml.XmlReaderSettings.ValidationFlags%2A>|<xref:System.Xml.Schema.XmlSchemaValidationFlags.ProcessIdentityConstraints>.|