[Kinisis] Update tests to ignore line ending differences

Author: iamcarbon

src/Amazon.Kinisis.Tests/Requests/PutRecordRequestTests.cs

@@ -15,6 +15,6 @@ public void CanSerialize()
                 "Data": "aGVsbG8="
               }
             }
-            """, putRecord.ToIndentedJsonString());
+            """, putRecord.ToIndentedJsonString(), ignoreLineEndingDifferences: true);
     }
 }