(DOCSP-16851) [OM] Fix curl command bug in Add CA Certificate to Ops Manager Java Trust Store-v7.0-backport (747) (#833)

# Backport

This will backport the following commits from `master` to `v7.0`:
- [(DOCSP-16851) [OM] Fix curl command bug in Add CA Certificate to Ops
Manager Java Trust Store
(#747)](10gen/docs-ops-manager#747)

<!--- Backport version: 9.6.1 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sorenlouv/backport)

Author: elyse-mdb

source/includes/steps-add-ca-cert-to-om-truststore.yaml

@@ -46,11 +46,19 @@ ref: add-credentials-automation-click-credentials
 title: "Test an HTTPS request to Ops Manager to confirm connectivity."
 content: |
   
-  After adding your webhook URL to the following command,
-  run it to test your webhook's HTTPS connectivity with Ops Manager. 
+  a. Convert your Java keystore file into PEM format.
 
-  .. code-block:: sh
+     Java keystores are stored in either JKS (Java KeyStore) or PKCS12 format. These formats
+     are incompatible with the curl ``--cacert`` option.
+
+     Use a tool of your choosing, such as ``openssl``, to convert your Java keystore file.
+
+  #. Replace the placeholder text in the following command with the path to your PEM certificate
+     and your webhook URL: 
+  
+     .. code-block:: sh
 
-    sudo curl -vvvv -cacert /opt/mongodb/mms/jdk/lib/security/cacerts <WebhookURL>
+        sudo curl -vvvv --cacert </path/to/cacerts.pem> <WebhookURL>
 
+  #. Run the command to test your webhook's HTTPS connectivity with Ops Manager.
 ...