Bump submodules/hydradx from 9ff87be to ea4e622 (#602)

Bumps [submodules/hydradx](https://github.com/galacticcouncil/HydraDX-node) from `9ff87be` to `ea4e622`.
- [Release notes](https://github.com/galacticcouncil/HydraDX-node/releases)
- [Commits](galacticcouncil/hydration-node@9ff87be...ea4e622)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>