fix: fix keymanager api for prysm#789

TobiWo wants to merge 1 commit intoethpandaops:mainethpandaops/ethereum-package:mainfrom

TobiWo:hotfix/fix-keymanager-api-for-prysmTobiWo/ethereum-package:hotfix/fix-keymanager-api-for-prysmCopy head branch name to clipboard