Bump FluentValidation from 12.0.0 to 12.1.0 (#1140)

---
updated-dependencies:
- dependency-name: FluentValidation
  dependency-version: 12.1.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]

src/Directory.Packages.props

@@ -4,7 +4,7 @@
     <CentralPackageTransitivePinningEnabled>true</CentralPackageTransitivePinningEnabled>
   </PropertyGroup>
   <ItemGroup>
-    <PackageVersion Include="FluentValidation" Version="12.0.0" />
+    <PackageVersion Include="FluentValidation" Version="12.1.0" />
     <PackageVersion Include="FluentValidation.DependencyInjectionExtensions" Version="12.0.0" />
     <PackageVersion Include="GraphQL" Version="8.7.0" />
     <PackageVersion Include="GraphQL.MicrosoftDI" Version="8.7.0" />