Swift: accept test changes

Author: AlexDenisov

swift/ql/test/extractor-tests/errors/Errors.expected

@@ -1,5 +1,5 @@
-| file://:0:0:0:0 | (no string representation) | ErrorType |
 | file://:0:0:0:0 | ... .combine(_:) | UnresolvedDotExpr |
+| file://:0:0:0:0 | <<error type>> | ErrorType |
 | overloaded.swift:6:5:6:5 | OverloadedDeclRefExpr | OverloadedDeclRefExpr |
 | unresolved.swift:5:1:5:14 | UnresolvedSpecializeExpr | UnresolvedSpecializeExpr |
 | unspecified.swift:3:1:3:23 | missing extended_type_decl from ExtensionDecl | UnspecifiedElement |