updated values for MCLI_OPS_MANAGER_SKIP_VERIFY (#922)

(cherry picked from commit 6aee32d)

Author: kyuan-mongodb

source/configure/environment-variables.txt

@@ -120,14 +120,14 @@ The {+mcli+} supports the following environment variables:
 
    * - | ``MCLI_OPS_MANAGER_SKIP_VERIFY``
        | *Ops Manager only*
-     - When set to ``yes``, the
+     - When set to ``true``, the
        ``MCLI_OPS_MANAGER_CA_CERTIFICATE`` TLS certificate is not
        verified. This prevents your connections from being rejected due
        to an invalid certificate.
 
        .. important::
 
-          Setting ``MCLI_OPS_MANAGER_SKIP_VERIFY`` to ``yes`` is
+          Setting ``MCLI_OPS_MANAGER_SKIP_VERIFY`` to ``true`` is
           insecure and is not recommended in production environments.
 
    * - ``HTTP_PROXY``, ``http_proxy``