Change certificate text.

Author: vmagelo

articles/cosmos-db/cassandra/manage-data-python.md

@@ -128,9 +128,9 @@ Now go back to the Azure portal to get your connection string information and co
     
 ## Use the X509 certificate
 
-1. Copy the **Baltimore CyberTrust Root** certificate details from [https://www.digicert.com/kb/digicert-root-certificates.htm](https://www.digicert.com/kb/digicert-root-certificates.htm) into a text file. Save the file using the file extension *.cer*.
+1. Copy the **Baltimore CyberTrust Root** certificate details from [https://www.digicert.com/kb/digicert-root-certificates.htm](https://www.digicert.com/kb/digicert-root-certificates.htm) into a text file. Download and save the *.pem* file with the file extension *.cer*.
 
-   The certificate has serial number `02:00:00:b9` and SHA1 fingerprint `d4:de:20:d0:5e:66:fc:53:fe:1a:50:88:2c:78:db:28:52:ca:e4:74`. Download the *.pem* file.
+   The certificate has serial number `02:00:00:b9` and SHA1 fingerprint `d4:de:20:d0:5e:66:fc:53:fe:1a:50:88:2c:78:db:28:52:ca:e4:74`.
 
 2. Open *pyquickstart.py* and change the `path\to\cert` to point to your new certificate.