Review request: removed unnecessary hardwired url

Signed-off-by: mrgarris0n <[email protected]>

Author: mrgarris0n

doc/_admin-guide/130_Correlating_log_messages/000_Correlating_messages_with_grouping-by.md

@@ -138,5 +138,4 @@ parser auditd_groupingby {
 };
 ```
 
-For another example, see [The grouping-by() parser in syslog-ng blog
-post](https://www.syslog-ng.com/community/b/blog/posts/the-grouping-by-parser-in-syslog-ng-3-8)
+For another example, see The grouping-by() parser in syslog-ng blog post.