Dev: Fix useExhaustiveDependencies — Percentile Calculator

[conbrad]

Describe the task
Remove biome-ignore lint/correctness/useExhaustiveDependencies comments and properly fix dep arrays in the Percentile Calculator page and results table.

Acceptance Criteria

• Remove biome-ignore comments from apps/wps-web/src/features/percentileCalculator/pages/PercentileCalculatorPage.tsx (lines 35, 39)
• Remove biome-ignore comments from apps/wps-web/src/features/percentileCalculator/components/PercentileStationResultTable.tsx (line 23)
• yarn biome lint passes with zero useExhaustiveDependencies errors on both files
• Selecting stations and a percentile then running a calculation renders results in the table correctly