Documentation issue, example for sslcertkey resource stores cert and key in invalid location

[stevenwright1]

The default path is noted within the cert and key parameters, however, using the default example path ("/var/tmp") will likely lead to data loss when the temporary data is cleared and (as noted in the parameter section) will not not sync between HA nodes. I think we should adjust the docs to use the following example.

resource "citrixadc_sslcertkey" "tf_sslcertkey" { certkey = "tf_sslcertkey" cert = "/nsconfig/ssl/certificate1.crt" key = "/nsconfig/ssl/key1.pem" notificationperiod = 40 expirymonitor = "ENABLED" }