Bump submodules/hydradx from 02adadc to 9ff87be

Bumps [submodules/hydradx](https://github.com/galacticcouncil/HydraDX-node) from `02adadc` to `9ff87be`.
- [Release notes](https://github.com/galacticcouncil/HydraDX-node/releases)
- [Commits](galacticcouncil/hydration-node@02adadc...9ff87be)

---
updated-dependencies:
- dependency-name: submodules/hydradx
  dependency-type: direct:production
...

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