Bump KorAP-Tokenizer to v2.3.0 and our version to 2.6.2

Change-Id: I7345e72cd67326797ca574bbf5f63bc3fb34de44
diff --git a/Readme.pod b/Readme.pod
index c097fd2..8cb2375 100644
--- a/Readme.pod
+++ b/Readme.pod
@@ -83,7 +83,7 @@
 In case everything went well, the C<tei2korapxml> tool will
 be available on your command line immediately.
 
-Minimum requirement for L<KorAP::XML::TEI> is Perl 5.16.
+Minimum requirement for L<KorAP::XML::TEI> is Perl 5.38.
 
 =head1 OPTIONS