Remove harmful «» advice

It was accidentally added in 190a1f3503

Even the next paragraph advices against it. I'm not sure how to make
the example simpler without making it less idiomatic.

Author: AlexDaniel

doc/Type/independent-routines.pod6

@@ -503,10 +503,10 @@ Runs an external command I<without involving a shell> and returns a
 L<Proc|/type/Proc> object. By default, the external command will print to
 standard output and error, and read from standard input.
 
-    run 'touch', '>foo.txt'; # Create a file named >foo.txt
+    run 'touch', '--', '*.txt'; # Create a file named “*.txt”
 
-    run <<rm >foo.txt>>; # Another way to use run, using word quoting for the
-                         # arguments
+    run <rm -- *.txt>; # Another way to use run, using word quoting for the
+                       # arguments
 
 If you want to pass some variables you can still use C«< >», but try
 to avoid using C<« »> as it will do word splitting if you forget to