fix(connector update): populate kafka url

[rkpattnaik780]

Closes #

Verification Steps

1. Run the following command to update a connector instance by id:

rhoas connector update --kafka-id ce6pg07k09f3rs6us7sg --id ce6tgb1mk0orirpo5i70

2. Ensure that the connectors instance has been updated, and the new Kafka URL has been specified.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation change
• Other (please specify)

[jackdelahunt]