Ensure response body is closed when a http request is not successful (#1912)

common/src/main/java/me/lucko/luckperms/common/web/AbstractHttpClient.java

@@ -46,6 +46,7 @@ public class AbstractHttpClient {
     protected Response makeHttpRequest(Request request) throws IOException {
         Response response = this.okHttp.newCall(request).execute();
         if (!response.isSuccessful()) {
+            response.close();
             throw new RuntimeException("Request was unsuccessful: " + response.code() + " - " + response.message());
         }
         return response;