Update Signature.pod6

Author: tisonkun

doc/Type/Signature.pod6

@@ -552,11 +552,11 @@ variable name:
 Aliases are also possible that way:
 
     sub alias-named(:color(:$colour), :type(:class(:$kind))) { say $colour ~ " " ~ $kind }
-    alias-named(color => "red", type => "A");     # both name can be use
-    alias-named(colour => "green", type => "B");  # more than two name is ok
+    alias-named(color => "red", type => "A");     # both names can be used
+    alias-named(colour => "green", type => "B");  # more than two names are ok
     alias-named(color => "white", class => "C");  # every alias is independent
 
-More use of alias can be found in L<sub MAIN|/language/functions#sub_MAIN>
+More use of aliases can be found in L<sub MAIN|/language/functions#sub_MAIN>
 
 A function with named arguments can be called dynamically, dereferencing a
 L<Pair|/type/Pair> with C<|> to turn it into a named argument.
@@ -788,4 +788,3 @@ Defined as:
 Throws C<X::Cannot::Capture>.
 
 =end pod
-