Bump IdentityModel from 5.2.0 to 7.0.0 (dotnet#510)

Bumps IdentityModel from 5.2.0 to 7.0.0.

---
updated-dependencies:
- dependency-name: IdentityModel
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Directory.Packages.props

@@ -91,5 +91,6 @@
     <PackageVersion Include="xunit" Version="2.9.0" />
     <PackageVersion Include="xunit.runner.visualstudio" Version="2.8.2" />
     <PackageVersion Include="Yarp.ReverseProxy" Version="2.1.0" />
+    <PackageVersion Include="IdentityModel" Version="7.0.0" />
   </ItemGroup>
 </Project>