[23.0] Fix minor error in WorkflowList help modal

[ahmedhamidawan]

Very minor mistake in the WorkflowList search help modal: we indicate there is a valid filterText="is:shared", whereas, the actual valid filter is "is:shared_with_me":

Screen.Recording.2023-05-06.at.2.25.33.PM.mov

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• I've included appropriate automated tests.
• This is a refactoring of components with existing test coverage.
• Instructions for manual testing are as follows:
  1. [add testing steps and prerequisites here if you didn't write automated tests covering all your changes]

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[davelopez]

Thank you!