Update containers.pod6

fix bad link

Author: finanalyst

doc/Language/containers.pod6

@@ -348,7 +348,7 @@ C<Three-letter>.
 
 Variables may have no container in them, yet still offer the ability to
 re-bind and typecheck that rebind. The reason for that is in such cases the
-binding operator L<:=|/operators#infix_:=> performs the typecheck:
+binding operator L<:=|/language/operators#infix_:=> performs the typecheck:
 
     my Int \z = 42;
     z := 100; # OK
@@ -416,4 +416,4 @@ work with types in Perl 6.
 
 =end pod
 
-# vim: expandtab softtabstop=4 shiftwidth=4 ft=perl6
+# vim: expandtab softtabstop=4 shiftwidth=4 ft=perl6