Communications handbook: fleetctl (#22397)

Fleetctl capitalization and formatting

handbook/company/communications.md

@@ -1126,6 +1126,7 @@ As we use sentence case, only the first word is capitalized. But, if a word woul
 - **Group of devices or virtual servers:** Use "fleet" or "fleets" (lowercase).
 - **Osquery:** Osquery should always be written in lowercase unless used to start a sentence or heading.
 - **Fleetd:** Fleetd should always be written in lowercase unless used to start a sentence or heading.
+- **Fleetctl:** Fleetctl should always be written in lowercase unless used to start a sentence or heading. Fleetctl should always be in plain text and not inside codeblocks text unless used in a command (ex. `fleetctl -help`).
 
 
 #### Device vs endpoint