Fix the OPA version bump workflow to work with the new README

[buidav]

🗣 Description

• This PR fixes the OPA version bump workflow by removing the code that assumes the old README format and tries to modify it.

Closes #1187

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[james-garriss]

I agree with deleting this code. I recommend creating a new issue to put the OPA version in the constants file and then create one workflow that creates one README file for ALL software requirements, thus doing everything consistently. Please link it to this epic: #1136

[buidav]

@nanda-katikaneni ready to merge