only-en pick-24 fix CMK macro use

Author: eseyffarth

src/onprem/en/snmp.asciidoc

@@ -57,7 +57,7 @@ v2c is a ‘light’ variant of v2 and the ‘c’ here stands for _community_,
 The 64-bit counters are essential in monitoring switch ports with 1 Gbit/s and more.
 The bulk queries accelerate monitoring by up to a factor of 10.
 |*v2* |Security |no |Version 2 offers even better security options in addition to the features of v2c.
-Version 2 of SNMP is not found in practice, therefore CMK does not support this protocol version.
+Version 2 of SNMP is not found in practice, therefore {CMK} does not support this protocol version.
 If you need security use xref:snmp#v3[version 3] instead. +
 *Attention:* Since the ‘real’ version 2 has no relevance, many masks in {CMK} refer simply to v2, but always really mean v2c.
 |*v3* |Security, +