For the overall repo, the committers are @hyperledger/learning-materials-dev-committers . In case it's necessary to be a member of the hyperledger GitHub organization to access that alias and you are not a member, you can reach out to the individuals: At this time, they are GitHub users tkuhrt, nathalie-ckc, bobbi28 .
Please refer to the ACTIVE/<project>/MAINTAINERS.md files.