Update libbeat/docs/shared-faq.asciidoc

Co-authored-by: DeDe Morton <dede.morton@elastic.co>

libbeat/docs/shared-faq.asciidoc

@@ -211,5 +211,5 @@ endif::no_dashboards[]
 === High RSS memory usage due to MADV settings
 
 In versions of {beatname_uc} prior to 7.10.2, the go runtime defaults to `MADV_FREE` by default.
-In some cases, this can lead to high RSS memory usage while the kernel waits to reclaim any pages assigned to {beatname_lc}.
+In some cases, this can lead to high RSS memory usage while the kernel waits to reclaim any pages assigned to {beatname_uc}.
 On versions prior to 7.10.2, set the `GODEBUG="madvdontneed=1"` environment variable if you run into RSS usage issues.