Add powsybl-open-rao to the release strategy

[olperr1]

Please check if the PR fulfills these requirements

• [X] The commit message follows our guidelines
• [ ] Tests for the changes have been added (for bug fixes / features)
• [X] Docs have been added / updated (for bug fixes / features)

Does this PR already have an issue describing the problem?

No

What kind of change does this PR introduce?

Docs update

What is the current behavior?

The release strategy doesn't consider powsybl-open-rao.

What is the new behavior (if this is a feature change)? powsybl-open-rao releasing is added to the release strategy.

Does this PR introduce a breaking change or deprecate an API?

• [ ] Yes
• [X] No