chore(deps): bump Microsoft.FeatureManagement

Bumps [Microsoft.FeatureManagement](https://github.com/Azure/AppConfiguration) from 2.6.1 to 3.0.0.
- [Commits](https://github.com/Azure/AppConfiguration/commits)

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

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

src/Authentication/Altinn.Platform.Authentication.csproj

@@ -21,7 +21,7 @@
     <PackageReference Include="Microsoft.AspNetCore.Antiforgery" Version="2.2.0" />
     <PackageReference Include="Microsoft.Azure.Services.AppAuthentication" Version="1.6.2" />
     <PackageReference Include="Microsoft.Extensions.Configuration.AzureKeyVault" Version="3.1.24" />
-	  <PackageReference Include="Microsoft.FeatureManagement" Version="2.6.1" />
+	  <PackageReference Include="Microsoft.FeatureManagement" Version="3.0.0" />
 	  <PackageReference Include="Microsoft.IdentityModel.Protocols.OpenIdConnect" Version="7.0.3" />
     <PackageReference Include="JWTCookieAuthentication" Version="3.0.1" />
     <PackageReference Include="Swashbuckle.AspNetCore" Version="6.5.0" />