This is the example from the webpage... (https://developer.sailpoint.com/docs/extensibility/rules/connector-rules#jdbcprovision-rule
The example rule needs to specify it's the name of the rule and not the ID - suggest replacing "Example Rule" with "Example Rule Name"
[
{
"op": "add",
"path": "/connectorAttributes/jdbcProvisionRule",
"value": "Example Rule"
}
]