[SR-Docs] typo in KEMI doc

[Seven Du]

hi, I found a typo in the KEMI doc seems like a copy&paste err but I didn't
find a way to fix it

https://kamailio.org/docs/tutorials/devel/kamailio-kemi-framework/core/#ksrhdrrmappend

the example seems copied from the remove one.

Thanks.

Seven.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.kamailio.org/pipermail/sr-docs/attachments/20211014/3e64e1bf/attachment.htm>