Bump FluentAssertions from 6.11.0 to 6.12.0

Bumps [FluentAssertions](https://github.com/fluentassertions/fluentassertions) from 6.11.0 to 6.12.0.
- [Release notes](https://github.com/fluentassertions/fluentassertions/releases)
- [Changelog](https://github.com/fluentassertions/fluentassertions/blob/develop/AcceptApiChanges.ps1)
- [Commits](fluentassertions/fluentassertions@6.11.0...6.12.0)

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

Signed-off-by: dependabot[bot] <support@github.com>

Tests/ChemSharp.Base.Tests/ChemSharp.Base.Tests.csproj

@@ -8,7 +8,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="FluentAssertions" Version="6.11.0"/>
+    <PackageReference Include="FluentAssertions" Version="6.12.0"/>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.6.3"/>
     <PackageReference Include="xunit" Version="2.4.2"/>
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.5">

Tests/ChemSharp.Molecules.Tests/ChemSharp.Molecules.Tests.csproj

@@ -8,7 +8,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="FluentAssertions" Version="6.11.0"/>
+    <PackageReference Include="FluentAssertions" Version="6.12.0"/>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.6.3"/>
     <PackageReference Include="xunit" Version="2.4.2"/>
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.5">

Tests/ChemSharp.Spectroscopy.Tests/ChemSharp.Spectroscopy.Tests.csproj

@@ -9,7 +9,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="FluentAssertions" Version="6.11.0"/>
+    <PackageReference Include="FluentAssertions" Version="6.12.0"/>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.6.3"/>
     <PackageReference Include="xunit" Version="2.4.2"/>
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.5">

Tests/ChemSharp.UnitConversion.Tests/ChemSharp.UnitConversion.Tests.csproj

@@ -8,7 +8,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="FluentAssertions" Version="6.11.0"/>
+    <PackageReference Include="FluentAssertions" Version="6.12.0"/>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.6.3"/>
     <PackageReference Include="xunit" Version="2.4.2"/>
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.5">