Missing exception type on xml docs for SingleOrDefault(src, predicate)

`public static TSource SingleOrDefault(this IEnumerable source);` has the doc for all exceptions.

`public static TSource SingleOrDefault(this IEnumerable source, Func predicate);`
looks like it's missing the invalid operation one.

```c#
// .....
// Exceptions:
// T:System.ArgumentNullException:
// source is null.
//
// T:System.InvalidOperationException:
// The input sequence contains more than one element.
public static TSource SingleOrDefault(this IEnumerable source);

// .....
// Exceptions:
// T:System.ArgumentNullException:
// source or predicate is null.
public static TSource SingleOrDefault(this IEnumerable source, Func predicate);
```