Describe the bug
The library is only taking into account getting JSON content. Therefore when obtaining XML content an exception is being generated.

To Reproduce
Point to a Logic App whose body content is either input or output in XML format

Expected behavior
Do not raise deserialization exception when XML content is required

Additional context
Exception: Unexpected character encountered while parsing value: <. Path '', line 0, position 0.
Call Stack: at Newtonsoft.Json.JsonTextReader.ParseValue()
at Newtonsoft.Json.JsonTextReader.Read()
at Newtonsoft.Json.Linq.JToken.ReadFrom(JsonReader reader, JsonLoadSettings settings)
at Newtonsoft.Json.Linq.JToken.Parse(String json, JsonLoadSettings settings)
at Newtonsoft.Json.Linq.JToken.Parse(String json)
at Invictus.Testing.LogicApps.LogicAppsProvider.d__23.MoveNext() in ...\Repos\testing-framework\src\Invictus.Testing.LogicApps\LogicAppsProvider.cs:line 306
Method: private static async Task GetHttpJsonStringAsync(string uri)
Line: return JToken.Parse(json);

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