[basic.lookup.general] Clarify that type-only lookup can find aliases

Clarify that type-only lookup can find type aliases.

Author: lprv

source/basic.tex

@@ -1731,11 +1731,11 @@
 \indextext{type-only!lookup|see{lookup, type-only}}%
 However, if a lookup is \defnx{type-only}{lookup!type-only},
 only declarations of
-types and templates whose specializations are types are considered;
+types, type aliases, and templates whose specializations are such are considered;
 furthermore, if declarations
 of a type alias and of its underlying entity are found,
-the declaration of the type alias is discarded
-instead of the type declaration.
+declarations of the type alias are discarded
+instead of the type declarations.
 
 \rSec2[class.member.lookup]{Member name lookup}%
 \indextext{lookup!member name}%