feat: Update Spinner appearance token

[tomi-msft]

fixes #28385

[fabricteam]

Perf Analysis (@fluentui/react-components)

No significant results to display.

All results

Scenario	Render type	Master Ticks	PR Ticks	Iterations	Status
Avatar	mount	639	588	5000
Button	mount	325	310	5000
Field	mount	1110	1103	5000
FluentProvider	mount	694	702	5000
FluentProviderWithTheme	mount	90	86	10
FluentProviderWithTheme	virtual-rerender	72	86	10
FluentProviderWithTheme	virtual-rerender-with-unmount	85	82	10
InfoButton	mount	18	13	5000
MakeStyles	mount	870	850	50000
Persona	mount	1719	1646	5000
SpinButton	mount	1361	1374	5000

[codesandbox-ci]

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Sandbox	Source
@fluentui/react 8 starter	Configuration
@fluentui/react-components 9 starter	Configuration

[fabricteam]

📊 Bundle size report

Package & Exports	Baseline (minified/GZIP)	PR	Change
react-spinner Spinner	19.668 kB 7.024 kB	19.678 kB 7.03 kB	10 B 6 B

Unchanged fixtures

Package & Exports	Size (minified/GZIP)
react-components react-components: Button, FluentProvider & webLightTheme	66.583 kB 18.469 kB
react-components react-components: Accordion, Button, FluentProvider, Image, Menu, Popover	203.817 kB 57.926 kB
react-components react-components: FluentProvider & webLightTheme	37.926 kB 12.419 kB
react-portal-compat PortalCompatProvider	6.48 kB 2.203 kB

_{🤖 This report was generated against ecaa08385bb0e25eafe87e3fb4424cb9139eea2d}

[size-auditor]

Asset size changes

Size Auditor did not detect a change in bundle size for any component!

Baseline commit: ecaa08385bb0e25eafe87e3fb4424cb9139eea2d (build)