Updating Readme to Use Correct Version of Protobuf

[shekhar316]

Updating Readme to Use Correct Version of protobuf

Description

This PR will do the following changes -

• updates the documentation to use correct version of protobuf library to avoid RayTaskError issues

Type of change

• [ ] Refactoring Code
• [ ] New feature
• [x] Documentation Update

How has this been tested?

Validated the version compatibility on Openshift-AI cluster using hpo-demos.

Test Configuration

• Kubernetes clusters tested on: Openshift-AI Cluster

Checklist 🎯

• [ ] Followed coding guidelines
• [ ] Comments added
• [ ] Dependent changes merged
• [X] Documentation updated
• [ ] Tests added or updated

Additional information

• RayTaskError clearly states to downgrade the protobuf version

  TypeError: Descriptors cannot be created directly.
  If this call came from a _pb2.py file, your generated code is out of date and must be regenerated with protoc >= 3.19.0.
  If you cannot immediately regenerate your protos, some other possible workarounds are:
  1. Downgrade the protobuf package to 3.20.x or lower.
  2. Set PROTOCOL_BUFFERS_PYTHON_IMPLEMENTATION=python (but this will use pure-Python parsing and will be much slower).
  3. More information: https://developers.google.com/protocol-buffers/docs/news/2022-05-06#python-updates 

• Known Issue of GitHub: https://github.com/ray-project/ray/issues/36417
• Another Reference: https://stackoverflow.com/questions/72441758/typeerror-descriptors-cannot-not-be-created-directly