(Azure CXP) Fixing minor spelling mistake

Fixing minor spelling superfluous "up"

Author: AshokPeddakotla-MSFT

articles/iot-edge/iot-edge-certs.md

@@ -31,7 +31,7 @@ The certificate authority, or 'CA' for short, is an entity that issues digital c
 
 ### Root CA certificate
 
-A root CA certificate is the root of trust of the entire process. In production scenarios, this CA certificate is usually purchased from a trusted commercial certificate authority like Baltimore, Verisign, or DigiCert. Should you have complete control over the devices connecting to your IoT Edge devices, it's possible to use a corporate level certificate authority. In either event, the entire certificate chain from the IoT Edge hub up rolls up to it, so the leaf IoT devices must trust the root certificate. You can store the root CA certificate either in the trusted root certificate authority store, or provide the certificate details in your application code.
+A root CA certificate is the root of trust of the entire process. In production scenarios, this CA certificate is usually purchased from a trusted commercial certificate authority like Baltimore, Verisign, or DigiCert. Should you have complete control over the devices connecting to your IoT Edge devices, it's possible to use a corporate level certificate authority. In either event, the entire certificate chain from the IoT Edge hub up rolls to it, so the leaf IoT devices must trust the root certificate. You can store the root CA certificate either in the trusted root certificate authority store, or provide the certificate details in your application code.
 
 ### Intermediate certificates