Bump FluentAssertions from 5.10.3 to 6.12.2

Bumps [FluentAssertions](https://github.com/fluentassertions/fluentassertions) from 5.10.3 to 6.12.2.
- [Release notes](https://github.com/fluentassertions/fluentassertions/releases)
- [Changelog](https://github.com/fluentassertions/fluentassertions/blob/develop/AcceptApiChanges.ps1)
- [Commits](fluentassertions/fluentassertions@5.10.3...6.12.2)

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

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

Author: dependabot[bot]

DigitalLearningSolutions.Web.AutomatedUiTests/DigitalLearningSolutions.Web.AutomatedUiTests.csproj

@@ -7,7 +7,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="FluentAssertions" Version="5.10.3" />
+    <PackageReference Include="FluentAssertions" Version="6.12.2" />
     <PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="6.0.25" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
     <PackageReference Include="Selenium.Axe" Version="4.0.14" />

DigitalLearningSolutions.Web.IntegrationTests/DigitalLearningSolutions.Web.IntegrationTests.csproj

@@ -8,7 +8,7 @@
 
   <ItemGroup>
     <PackageReference Include="FakeItEasy" Version="7.4.0" />
-    <PackageReference Include="FluentAssertions.AspNetCore.Mvc" Version="3.2.0" />
+    <PackageReference Include="FluentAssertions.AspNetCore.Mvc" Version="4.1.0" />
     <PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="6.0.25" />
     <PackageReference Include="xunit" Version="2.6.2" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.1">

DigitalLearningSolutions.Web.Tests/DigitalLearningSolutions.Web.Tests.csproj

@@ -9,7 +9,7 @@
 
   <ItemGroup>
     <PackageReference Include="FakeItEasy" Version="7.4.0" />
-    <PackageReference Include="FluentAssertions" Version="5.10.3" />
+    <PackageReference Include="FluentAssertions" Version="6.12.2" />
     <PackageReference Include="FluentAssertions.AspNetCore.Mvc" Version="3.2.0" />
     <PackageReference Include="NBuilder" Version="6.1.0" />
     <PackageReference Include="NUnit" Version="3.14.0" />