Update content/hardware/04.pro/carriers/portenta-max-carrier/features.md

Co-authored-by: Ali Jahangiri <75624145+aliphys@users.noreply.github.com>

Author: sebromero

content/hardware/04.pro/carriers/portenta-max-carrier/features.md

@@ -29,7 +29,7 @@ The **Portenta Max Carrier** includes a wide range of features to give you flexi
 
 <Feature title="Connectivity" image="connection">
 
-  Access a wide range of I/O including high density connectors, Gigabit Ethernet, mini PCIe, 3.5mm audio in/out as well as Serial RS232/422/485  
+  Access a wide range of I/O including high density connectors, Gigabit Ethernet, mini PCIe (PCI Express), 3.5mm audio in/out as well as Serial RS232/422/485  
 
 </Feature>