docs: Warn against using `ui.modal(fade=True)` when showing/hiding too quickly #6074

Job	Run time
playwright-deploys-precheck (3.10)	1m 33s
check (3.12, ubuntu-latest)	2m 29s
test-narwhals-integration	38s
check (3.12, windows-latest)	5m 53s
check (3.12, macOS-latest)	1m 43s
check (3.11, ubuntu-latest)	2m 22s
check (3.11, windows-latest)	3m 55s
playwright-examples (3.12, chromium)	3m 51s
check (3.11, macOS-latest)	1m 45s
check (3.10, ubuntu-latest)	2m 29s
playwright-examples (3.12, firefox)	4m 33s
check (3.10, windows-latest)	5m 47s
playwright-shiny (3.12, chromium)	5m 31s
playwright-examples (3.12, webkit)	3m 45s
check (3.10, macOS-latest)	2m 37s
playwright-shiny (3.12, firefox)	4m 59s
playwright-examples (3.11, chromium)	3m 51s
check (3.9, ubuntu-latest)	2m 29s
playwright-shiny (3.12, webkit)	4m 51s
check (3.9, windows-latest)	5m 23s
playwright-examples (3.11, firefox)	4m 5s
playwright-shiny (3.11, chromium)	4m 23s
playwright-examples (3.11, webkit)	4m 20s
check (3.9, macOS-latest)	2m 7s
playwright-shiny (3.11, firefox)	5m 1s
playwright-examples (3.10, chromium)	3m 58s
playwright-shiny (3.11, webkit)	4m 49s
playwright-examples (3.10, firefox)	4m 29s
playwright-shiny (3.10, chromium)	4m 18s
playwright-examples (3.10, webkit)	4m 21s
playwright-shiny (3.10, firefox)	5m 9s
playwright-examples (3.9, chromium)	4m 30s
playwright-shiny (3.10, webkit)	4m 58s
playwright-shiny (3.9, chromium)	4m 29s
playwright-examples (3.9, firefox)	4m 8s
playwright-shiny (3.9, firefox)	5m 2s
playwright-examples (3.9, webkit)	3m 40s
Deploy to PyPI	0s
	2h 24m 11s

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