Bump Microsoft.Identity.Client (#760)

Bumps [Microsoft.Identity.Client](https://github.com/AzureAD/microsoft-authentication-library-for-dotnet) from 4.48.1 to 4.59.1.
- [Release notes](https://github.com/AzureAD/microsoft-authentication-library-for-dotnet/releases)
- [Changelog](https://github.com/AzureAD/microsoft-authentication-library-for-dotnet/blob/main/CHANGELOG.md)
- [Commits](AzureAD/microsoft-authentication-library-for-dotnet@4.48.1...4.59.1)

---
updated-dependencies:
- dependency-name: Microsoft.Identity.Client
  dependency-type: direct:production
...

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

Samples/auth/Outlook-Add-in-SSO/AttachmentDemo-ASPNETCore/AttachmentDemo-ASPNETCore.csproj

@@ -9,7 +9,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.Identity.Client" Version="4.48.1" />
+    <PackageReference Include="Microsoft.Identity.Client" Version="4.59.1" />
     <PackageReference Include="Microsoft.Identity.Web" Version="1.25.6" />
     <PackageReference Include="Microsoft.Identity.Web.MicrosoftGraph" Version="1.25.6" />
     <PackageReference Include="Microsoft.IdentityModel.Abstractions" Version="6.25.0" />