update docs on metric value needing to be greater than activation value

[DP19]

Related to kedacore/keda#5383. Updating the activation docs to make it more clear on the value needing to be greater than this value, not equal to

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Fixes kedacore/keda#5383

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[JorTurFer]

Thanks for the clarification! Could you update versions above 2.8 as well? We introduced the activation concept on v2.8 so adding this clarification on all the affected version would be nice

[DP19]

Thanks for the clarification! Could you update versions above 2.8 as well? We introduced the activation concept on v2.8 so adding this clarification on all the affected version would be nice

@JorTurFer 👍🏻 - Also updated 2.14 since 2.13 was just released

[JorTurFer]

Thanks a lot for the improvement!