Bump Microsoft.FeatureManagement from 3.0.0 to 3.1.0

Bumps [Microsoft.FeatureManagement](https://github.com/Azure/AppConfiguration) from 3.0.0 to 3.1.0.
- [Commits](https://github.com/Azure/AppConfiguration/commits)

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

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

Author: dependabot[bot]

DigitalLearningSolutions.Web/DigitalLearningSolutions.Web.csproj

@@ -69,7 +69,7 @@
 		<PackageReference Include="HtmlSanitizer" Version="8.0.746" />
         <PackageReference Include="Microsoft.AspNetCore.Mvc.Razor.RuntimeCompilation" Version="6.0.24" />
         <PackageReference Include="Microsoft.Data.SqlClient" Version="5.1.2" />
-        <PackageReference Include="Microsoft.FeatureManagement" Version="3.0.0" />
+        <PackageReference Include="Microsoft.FeatureManagement" Version="3.1.0" />
         <PackageReference Include="Microsoft.FeatureManagement.AspNetCore" Version="2.5.1" />
         <PackageReference Include="Microsoft.VisualStudio.Web.BrowserLink" Version="2.2.0" />
         <PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" Version="6.0.16" />