Fix spelling in error message

Author: hth313

src/FSharp.Data.GraphQL.Client/BaseTypes.fs

@@ -346,7 +346,7 @@ module internal JsonValueHelper =
                             | Some "Date" ->
                                 match DateTime.TryParse(s, CultureInfo.InvariantCulture, DateTimeStyles.None) with
                                 | (true, d) -> box d
-                                | _ -> failwith "A string was received in the query response, and the schema recognizes it as a date and time sring, but the conversion failed."
+                                | _ -> failwith "A string was received in the query response, and the schema recognizes it as a date and time string, but the conversion failed."
                             | Some _ ->
                                 box s
                             | _ -> failwith "A string type was received in the query response item, but the matching schema field is not a string based type."
@@ -362,7 +362,7 @@ module internal JsonValueHelper =
                     | Some "Date" ->
                         match DateTime.TryParse(s, CultureInfo.InvariantCulture, DateTimeStyles.None) with
                         | (true, d) -> makeSomeIfNeeded d
-                        | _ -> failwith "A string was received in the query response, and the schema recognizes it as a date and time sring, but the conversion failed."
+                        | _ -> failwith "A string was received in the query response, and the schema recognizes it as a date and time string, but the conversion failed."
                     | Some _ ->
                         s |> makeSomeIfNeeded
                     | _ -> failwith "A string type was received in the query response item, but the matching schema field is not a string based type."