Update a source swap policy

Update a source swap policy. **Beta**: Updating a **Connection** source swap policy is in private beta and must be enabled for your organization. This documentation is subject to the [Beta features](/docs/sigma-product-releases#beta-features) disclaimer. ### Usage notes - Retrieve the **policyId** by calling the [/v2/sourceSwapPolicies](https://help.sigmacomputing.com/reference/list-source-swap-policies) endpoint. - Retrieve the **connectionId** to use as the **fromConnectionId** by calling the [/v2/connections](https://help.sigmacomputing.com/reference/list-connections) endpoint. - Retrieve the **userAttributeId** to use in the **swaps** object by calling the [/v2/user-attributes](https://help.sigmacomputing.com/reference/list-user-attributes) endpoint.