DOCSP-16135 fix typo (#190)

* Review feedback

* Review feedback

* DOCSP-16135

Author: Dave

source/install.txt

@@ -118,7 +118,7 @@ Select the appropriate tab for your operating system:
             :tabid: rpm
 
             :binary:`mongosh` is available as ``yum`` package for
-            :abbr:`RHEL Red Hat Enterprise Linux` and Amazon Linux 2.
+            :abbr:`RHEL (Red Hat Enterprise Linux)` and Amazon Linux 2.
 
             .. include:: /includes/steps/install-shell-linux-rpm.rst