chore(deps): update dependency polly to v7.2.3

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
Polly	nuget	patch	7.2.0 -> 7.2.3

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Release Notes

App-vNext/Polly

v7.2.3

Compare Source

• Add RateLimit policy - Thanks to @​reisenberger
• Various codebase health updates - Thanks to @​SimonCropp
• Add benchmarks project - Thanks to @​martincostello
• Fix broken README image - Thanks to @​GitHubPang

v7.2.2

Compare Source

• Recursively search all AggregateException inner exceptions for predicate matches when using HandleInner() (#​818) - Thanks to @​sideproject
• Polly now builds deterministically - Thanks to @​304NotModified
• Bug fix: the timeoutStrategy parameter was not being used by the TimeoutAsync(Func<TimeSpan>, TimeoutStrategy, Func<Context, TimeSpan, Task, Task>) method - Thanks to @​martincostello
• Bug fix: the solution can now be built with the .NET 5.0 SDK - Thanks to @​martincostello

v7.2.1

Compare Source

• Upgrade SourceLink to RTM v1 (fixes building from source for latest .NET Core 3.1.x)
• Bug fix: rare circuit-breaker race condition causing NullReferenceException when circuit throws BrokenCircuitException.

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