Update a resource

Labels PATCH behavior

Suppose a resource has the following labels:

- group: P
  - values: a, b, c
- group: Q
  - values: x, y, z

If a PATCH request is made with the following labels...

- group: R
  - values: i, j

...then the updated resource will have the following labels:

- group: R
  - values: i, j