fix(deps): Bump @relaycorp/relaynet-core from 1.87.5 to 1.87.6

Bumps [@relaycorp/relaynet-core](https://github.com/relaycorp/relaynet-core-js) from 1.87.5 to 1.87.6.
- [Release notes](https://github.com/relaycorp/relaynet-core-js/releases)
- [Commits](relaycorp/relaynet-core-js@v1.87.5...v1.87.6)

---
updated-dependencies:
- dependency-name: "@relaycorp/relaynet-core"
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>