irc: move to pcre2 module

roles/irc/templates/inspircd/modules.conf

@@ -51,7 +51,7 @@
              forwardmsg="NOTICE $nick :*** Forwarding PASS to $nickrequired"
 	     cmd="PRIVMSG $nickrequired :IDENTIFY $pass">
 <module name="m_password_hash.so">
-<module name="m_regex_pcre.so">
+<module name="m_regex_pcre2.so">
 <module name="m_sasl.so">
 <module name="m_services_account.so">
 <module name="m_sethost.so">