Bump RestSharp from 106.12.0 to 106.15.0

Bumps [RestSharp](https://github.com/restsharp/RestSharp) from 106.12.0 to 106.15.0.
- [Release notes](https://github.com/restsharp/RestSharp/releases)
- [Changelog](https://github.com/restsharp/RestSharp/blob/dev/releasenotes.md)
- [Commits](restsharp/RestSharp@106.12...106.15.0)

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

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

Author: dependabot[bot]

src/Fortnite-API/Fortnite-API.csproj

@@ -39,7 +39,7 @@
 
 	<ItemGroup>
 		<PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
-		<PackageReference Include="RestSharp" Version="106.12.0" />
+		<PackageReference Include="RestSharp" Version="106.15.0" />
 	</ItemGroup>
 
   <ItemGroup>