Fix label/input id mismatches in apiCalls forms

[aaronbrethorst]

Two `<label for="...">` attributes in the apiCalls params forms point at ids that don't exist on the inputs they're supposed to label, breaking screen-reader association and click-to-focus.

• `transitclockWebapp/src/main/webapp/reports/apiCalls/predsByRouteStopApiParams.jsp` (lines 35–37) — `<label for="stop">` should be `for="stopId"`
• `transitclockWebapp/src/main/webapp/reports/apiCalls/tripWithTravelTimesApiParams.jsp` (lines 27–28) — `<label for="trip">` should be `for="tripId"`

Source

• PR Modernize webapp UI: Tailwind shell, Stimulus, layout tags #29: Modernize webapp UI: Tailwind shell, Stimulus, layout tags #29
• CodeRabbit comments: Modernize webapp UI: Tailwind shell, Stimulus, layout tags #29 (review)