chore(deps): update dependency polyfill to 8.9.1

[thomhurst]

This PR contains the following updates:

Package	Type	Update	Change
Polyfill	nuget	minor	8.7.4 -> 8.9.1

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Release Notes

SimonCropp/Polyfill (Polyfill)

v8.9.1

Compare Source

v8.9.0

Compare Source

v8.8.1

Compare Source

v8.8.0

Compare Source

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