Update protobuf version to 3.18.3 in tools/ci_build/github/linux/docker/scripts/requirements.txt. (#13922)
### Description
<!-- Describe your changes. -->
Update protobuf version to 3.18.3 in
tools/ci_build/github/linux/docker/scripts/requirements.txt.
### Motivation and Context
Address component governance alert CVE-2022-1941