fix: sliderMoved event on RangeSliders

[codecov[bot]]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (bace50f) 87.30% compared to head (1302f7e) 87.30%. Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #200 +/- ## ======================================= Coverage 87.30% 87.30% ======================================= Files 45 45 Lines 3323 3324 +1 ======================================= + Hits 2901 2902 +1 Misses 422 422 ``` | [Files Changed](https://app.codecov.io/gh/pyapp-kit/superqt/pull/200?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pyapp-kit) | Coverage Δ | | |---|---|---| | [src/superqt/sliders/\_labeled.py](https://app.codecov.io/gh/pyapp-kit/superqt/pull/200?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pyapp-kit#diff-c3JjL3N1cGVycXQvc2xpZGVycy9fbGFiZWxlZC5weQ==) | `84.02% <100.00%> (+0.03%)` | :arrow_up: |

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