Adjust trial wording for the group selector dropdown

What does this MR do and why?

Adjust trial wording for the group selector dropdown

• more precise language
• update for duo pro trials

MR acceptance checklist

Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

Screenshots or screen recordings

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context	Before	After
ultimate trials
duo pro trials

Related to #452177