Update dependency MediatR.Extensions.Microsoft.DependencyInjection to 8.1.0

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This PR contains the following updates:

Package	Type	Update	Change
MediatR.Extensions.Microsoft.DependencyInjection	nuget	minor	8.0.0 -> 8.1.0

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Release Notes

jbogard/MediatR.Extensions.Microsoft.DependencyInjection (MediatR.Extensions.Microsoft.DependencyInjection)

### [`v8.0.1`](https://redirect.github.com/jbogard/MediatR.Extensions.Microsoft.DependencyInjection/releases/tag/v8.0.1): 8.0.1 This release adds support for calling `AddMediatR` multiple times ([#​77](https://redirect.github.com/jbogard/MediatR.Extensions.Microsoft.DependencyInjection/issues/77))

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Configuration

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