Bump Swashbuckle.AspNetCore.ReDoc from 6.3.1 to 6.4.0

Bumps [Swashbuckle.AspNetCore.ReDoc](https://github.com/domaindrivendev/Swashbuckle.AspNetCore) from 6.3.1 to 6.4.0.
- [Release notes](https://github.com/domaindrivendev/Swashbuckle.AspNetCore/releases)
- [Commits](https://github.com/domaindrivendev/Swashbuckle.AspNetCore/compare/v6.3.1...v6.4.0)

---
updated-dependencies:
- dependency-name: Swashbuckle.AspNetCore.ReDoc
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Jellyfin.Api/Jellyfin.Api.csproj

@@ -20,7 +20,7 @@
     <PackageReference Include="Microsoft.AspNetCore.Authorization" Version="6.0.8" />
     <PackageReference Include="Microsoft.Extensions.Http" Version="6.0.0" />
     <PackageReference Include="Swashbuckle.AspNetCore" Version="6.2.3" />
-    <PackageReference Include="Swashbuckle.AspNetCore.ReDoc" Version="6.3.1" />
+    <PackageReference Include="Swashbuckle.AspNetCore.ReDoc" Version="6.4.0" />
   </ItemGroup>
 
   <ItemGroup>