Update pipeline/filters/record-modifier.md

Co-authored-by: Craig Norris <[email protected]>
Signed-off-by: esmerel <[email protected]>

Author: esmerel

pipeline/filters/record-modifier.md

@@ -20,7 +20,7 @@ The plugin supports the following configuration parameters:
 To start filtering records, run the filter from the command line or through a
 configuration file.
 
-This is a sample `in_mem` record to filter.
+This is a sample `in_mem` record to filter:
 
 ```text
 {"Mem.total"=>1016024, "Mem.used"=>716672, "Mem.free"=>299352, "Swap.total"=>2064380, "Swap.used"=>32656, "Swap.free"=>2031724}