Bump github.com/ethereum/go-ethereum from 1.10.6 to 1.10.8 (#701)

Bumps [github.com/ethereum/go-ethereum](https://github.com/ethereum/go-ethereum) from 1.10.6 to 1.10.8.
- [Release notes](https://github.com/ethereum/go-ethereum/releases)
- [Commits](ethereum/go-ethereum@v1.10.6...v1.10.8)

---
updated-dependencies:
- dependency-name: github.com/ethereum/go-ethereum
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

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

go.mod

@@ -8,7 +8,7 @@ require (
 	github.com/ChainSafe/log15 v1.0.0
 	github.com/centrifuge/go-substrate-rpc-client v2.0.0+incompatible
 	github.com/deckarep/golang-set v1.7.1 // indirect
-	github.com/ethereum/go-ethereum v1.10.6
+	github.com/ethereum/go-ethereum v1.10.8
 	github.com/prometheus/client_golang v1.4.1
 	github.com/stretchr/testify v1.7.0
 	github.com/urfave/cli/v2 v2.3.0