Bump Microsoft.Identity.Web in /SamplesDashboard/SamplesDashboard

Bumps [Microsoft.Identity.Web](https://github.com/AzureAD/microsoft-identity-web) from 1.25.10 to 2.6.1.
- [Release notes](https://github.com/AzureAD/microsoft-identity-web/releases)
- [Changelog](https://github.com/AzureAD/microsoft-identity-web/blob/master/changelog.md)
- [Commits](AzureAD/microsoft-identity-web@1.25.10...2.6.1)

---
updated-dependencies:
- dependency-name: Microsoft.Identity.Web
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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Author: dependabot[bot]

SamplesDashboard/SamplesDashboard/SamplesDashboard.csproj

@@ -18,7 +18,7 @@
     <PackageReference Include="GraphQL.Client.Serializer.SystemTextJson" Version="5.1.0" />
     <PackageReference Include="Microsoft.AspNetCore.SpaServices.Extensions" Version="5.0.17" />
     <PackageReference Include="Microsoft.Extensions.Http.Polly" Version="7.0.2" />
-    <PackageReference Include="Microsoft.Identity.Web" Version="1.25.10" />
+    <PackageReference Include="Microsoft.Identity.Web" Version="2.6.1" />
     <PackageReference Include="Microsoft.IdentityModel.KeyVaultExtensions" Version="6.25.1" />
     <PackageReference Include="NuGet.Protocol" Version="6.5.0" />
     <PackageReference Include="Octokit" Version="4.0.4" />