Bump FastEndpoints.Swagger from 5.5.0 to 5.9.0

Bumps [FastEndpoints.Swagger](https://github.com/FastEndpoints/Library) from 5.5.0 to 5.9.0.
- [Release notes](https://github.com/FastEndpoints/Library/releases)
- [Commits](FastEndpoints/FastEndpoints@v5.5...v5.9)

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

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

Author: dependabot[bot]

Directory.Packages.props

@@ -19,7 +19,7 @@
     <PackageVersion Include="coverlet.collector" Version="3.2.0" />
     <PackageVersion Include="FastEndpoints" Version="5.5.0" />
     <PackageVersion Include="FastEndpoints.ApiExplorer" Version="2.0.1" />
-    <PackageVersion Include="FastEndpoints.Swagger" Version="5.5.0" />
+    <PackageVersion Include="FastEndpoints.Swagger" Version="5.9.0" />
     <PackageVersion Include="FastEndpoints.Swagger.Swashbuckle" Version="2.0.1" />
     <PackageVersion Include="MediatR" Version="11.1.0" />
     <PackageVersion Include="Microsoft.AspNetCore.Mvc.NewtonsoftJson" Version="7.0.1" />