Update pipeline/outputs/counter.md

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

Author: esmerel

pipeline/outputs/counter.md

@@ -54,7 +54,7 @@ pipeline:
 
 ## Testing
 
-Once Fluent Bit is running, you will see the reports similar to this in the output interface:
+When Fluent Bit is running, you will see the reports similar to this in the output interface:
 
 ```text
 ...