fixing language to be C# (#5650)

frameworks/CSharp/easyrpc/benchmark_config.json

@@ -10,8 +10,8 @@
         "classification": "Fullstack",
         "database": "postgres",
         "framework": "EasyRpc",
-        "language": "CSharp",
-        "flavor": "None",
+        "language": "C#",
+        "flavor": "CoreCLR",
         "orm": "Raw",
         "platform": ".Net",
         "webserver": "Kestrel",