DOCSP-30028 added note about rhel server (#275)

Author: kyuan-mongodb

source/core/requirements.txt

@@ -418,7 +418,7 @@ Intel/AMD (``x86_64``) Hardware Architectures
      - 10, 11
      - 11, 12
 
-   * - Red Hat Enterprise Linux
+   * - :abbr:`RHEL (Red Hat Enterprise Linux)` :sup:`1`
      - 7, 8, 9
      - 7 *(deprecated)*, 8, 9
 
@@ -429,7 +429,9 @@ Intel/AMD (``x86_64``) Hardware Architectures
    * - Ubuntu
      - 18.04, 20.04, 22.04
      - 20.04 *(deprecated)*, 22.04
-   
+
+:sup:`1` :abbr:`RHEL (Red Hat Enterprise Linux)` is different from :abbr:`RHEL (Red Hat Enterprise Linux)` Server. |mms| supports only :abbr:`RHEL (Red Hat Enterprise Linux)`.
+
 .. note::
 
    Though the {+mdbagent+} can be installed on ``s390x`` and on