Missing R_MSEC instances

Signed-off-by: mrgarris0n <gergely.karacsonyi@gmail.com>

Author: mrgarris0n

doc/_admin-guide/180_Best_practices_and_examples/005_Load_balancing_logs/README.md

@@ -5,10 +5,10 @@ description: >-
     These sections describe a method of load balancing logs between multiple
     {{ site.product.short_name }} destinations. The first
     subsection describes the round robin load balancing method based on the
-    R_MSEC macro of {{ site.product.short_name }}, while the second subsection describes a
+    ${R_MSEC} macro of {{ site.product.short_name }}, while the second subsection describes a
     configuration generator that you can use as an alternative to using the
     example configuration described in the first subsection.
 ---
 
-For more information about the R_MSEC macro and further macros of
+For more information about the ${R_MSEC} macro and further macros of
 {{ site.product.short_name }}, see Macros of {{ site.product.short_name }}.