build(deps): update dependency polyfill to 7.1.2

[renovate]

This PR contains the following updates:

Package	Type	Update	Change	Pending	OpenSSF
Polyfill	nuget	patch	7.1.1 -> 7.1.2	7.2.0

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Release Notes

SimonCropp/Polyfill (Polyfill)

v7.1.2

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[codecov]

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Additional details and impacted files

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  Files           ?       41           
  Lines           ?     1380           
  Branches        ?      162           
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  Hits            ?      701           
  Misses          ?      617           
  Partials        ?       62           

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