Examples: fix sketch description using SecureElement naming

Author: pennam

Diff for: examples/CertificateSigningRequest/CertificateSigningRequest.ino

@@ -4,7 +4,7 @@
   This sketch can be used to generate a CSR for a private key
   generated in an ECC508/ECC608 or SE050 crypto chip slot.
 
-  If the ECC508/ECC608 is not configured and locked it prompts
+  If the SecureElement is not configured and locked it prompts
   the user to configure and lock the chip with a default TLS
   configuration.
 

Diff for: examples/SelfSignedCertificate/SelfSignedCertificate.ino

@@ -4,7 +4,7 @@
   This sketch can be used to generate a self signed certificate
   for a private key generated in an ECC508/ECC608 or SE050 crypto chip slot.
 
-  If the crypto chip is not configured and locked it prompts
+  If the SecureElement is not configured and locked it prompts
   the user to configure and lock the chip with a default TLS
   configuration.
 
@@ -145,4 +145,4 @@ String readLine() {
   }
 
   return line;
-}
+}