+cross-reference to /type/Str (#4713)

Author: schultzdavid

doc/Language/regexes.rakudoc

@@ -3066,4 +3066,7 @@ The L<Regexes: Best practices and gotchas|/language/regexes-best-practices>
 provides useful information on how to avoid common pitfalls when writing regexes
 and grammars.
 
+See also the type reference for L<C<Str>|/type/Str> for an overview of
+ways other than regexes to investigate and manipulate strings.
+
 =end pod