chore: bump the all group in /examples/msal-net/akvdotnet with 1 update

Bumps the all group in /examples/msal-net/akvdotnet with 1 update: [Microsoft.Identity.Client](https://github.com/AzureAD/microsoft-authentication-library-for-dotnet).

- [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@4.54.0...4.56.0)

---
updated-dependencies:
- dependency-name: Microsoft.Identity.Client
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: all
...

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

examples/msal-net/akvdotnet/akvdotnet.csproj

@@ -6,7 +6,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.Identity.Client" Version="4.54.0" />
+    <PackageReference Include="Microsoft.Identity.Client" Version="4.56.0" />
     <PackageReference Include="Azure.Security.KeyVault.Secrets" Version="4.5.0" />
   </ItemGroup>