Merge pull request #311597 from raghavendermareddy/patch-284971

Fix command syntax for openssl in documentation

Author: prmerger-automator[bot]

articles/expressroute/expressroute-howto-routing-portal-resource-manager.md

@@ -98,7 +98,7 @@ When you configure public IP address prefixes to advertise over BGP, Microsoft v
     ```bash
     # Generate a private key using openssl:
 
-    openssl.exe genpkey -algorithm rsa -out privkey.pem -pkeyopt rsa_keygen_bits:4096
+    openssl genpkey -algorithm rsa -out privkey.pem -pkeyopt rsa_keygen_bits:4096
 
     # Generate the corresponding public key: