feat: avoid running entire unit test suite on snapshot update

### Problem
as part of the release process, we update the snapshots via `npm run test:update-snapshots`. This takes a long time, and isn't needed because the PR created from the release runs these tests again.

### Definition of Done
- streamline the release process by allowing us to update the snapshots without running the entire unit test suite.

Start by inspecting the npm script behind `npm run test:update-snapshots` and the release process that invokes it. Adjust the snapshot-update path so it does not run the entire unit test suite, then verify that snapshots still update and the release-created PR runs the tests.

Written by the indexing model from the issue text.