fix: use reth-rbuilder image as the default mev_builder_image in network_params.yaml#1077

barnabasbusa merged 3 commits intoethpandaops:mainethpandaops/ethereum-package:mainfrom

bharath-123:bharath/update-default-mev-boost-builderbharath-123/ethereum-package:bharath/update-default-mev-boost-builderCopy head branch name to clipboard