renamed "unknowntype" to "unknown_type"

javascript/ql/src/semmle/javascript/TypeScript.qll

@@ -1993,7 +1993,7 @@ class AnyType extends Type, @any_type { }
 /**
  * The predefined `unknown` type.
  */
-class UnknownType extends Type, @unknowntype { }
+class UnknownType extends Type, @unknown_type { }
 
 /**
  * The predefined `string` type.

javascript/ql/src/semmlecode.javascript.dbscheme

@@ -635,7 +635,7 @@ case @type.kind of
 | 20 = @this_type
 | 21 = @number_literal_type
 | 22 = @string_literal_type
-| 23 = @unknowntype
+| 23 = @unknown_type
 | 24 = @biginttype
 | 25 = @bigintliteraltype
 ;

javascript/ql/src/semmlecode.javascript.dbscheme.stats

@@ -994,7 +994,7 @@
 <v>30638</v>
 </e>
 <e>
-<k>@unknowntype</k>
+<k>@unknown_type</k>
 <v>100</v>
 </e>
 <e>