[BUG] Fix range F-beta when beta is not 1

[SashaMIT]

Reference Issues/PRs

None found.

What does this implement/fix? Explain your changes.

range_f_score divided by beta**2 * (precision + recall). The weighted harmonic mean divides by beta**2 * precision + recall. On the overlapping range already in the tests, precision is 0.75 and recall is 0.6. beta=1 is still 0.666667. beta=0.5 returned 1.666667. It is now 0.714286.

Does your contribution introduce a new dependency? If yes, which one?

No.

Any other comments?

test_range_f_score_beta_is_the_weighted_harmonic_mean failed on main with 1.666667 and passes after the change. The other 8 tests in test_range_ts_metrics.py still pass. The rest of the package pytest suite was not run.

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