kmc.nf: change version output

src/modules/kmc.nf

@@ -24,7 +24,7 @@ process FASTKMERS {
 
     cat <<-END_VERSIONS > versions.yml
     "${task.process}":
-        kmc: \$(echo \$(kmc --version 2>&1))
+        kmc: 3.2.2 
     END_VERSIONS
     """
 }