build(deps): bump sp-arithmetic from ee4ee95 to 4e22d40

Bumps [sp-arithmetic](https://github.com/gluwa/substrate) from `ee4ee95` to `4e22d40`.
- [Commits](gluwa/substrate@ee4ee95...4e22d40)

---
updated-dependencies:
- dependency-name: sp-arithmetic
  dependency-type: direct:production
...

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