nuget-azure-ad-b2c-backend: Bump Microsoft.Identity.Web from 4.0.1 to 4.2.0

---
updated-dependencies:
- dependency-name: Microsoft.Identity.Web
  dependency-version: 4.2.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

samples/AzureADB2CAuth/auth-backend/Directory.Packages.props

@@ -4,7 +4,7 @@
     <PackageVersion Include="Microsoft.AspNetCore.Mvc.NewtonsoftJson" Version="10.0.1" />
     <PackageVersion Include="Microsoft.AspNetCore.Mvc.Testing" Version="10.0.1" />
     <PackageVersion Include="Microsoft.AspNetCore.SpaProxy" Version="10.0.1" />
-    <PackageVersion Include="Microsoft.Identity.Web" Version="4.0.1" />
+    <PackageVersion Include="Microsoft.Identity.Web" Version="4.2.0" />
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />
     <PackageVersion Include="Microsoft.Testing.Extensions.CodeCoverage" Version="17.14.2" />
     <PackageVersion Include="NSwag.AspNetCore" Version="14.6.2" />