Fixed grammar on SessionOptions.IOTimeout XML (#31174)

Fixed grammar on `SessionOptions.IOTimeout`

src/Middleware/Session/src/SessionOptions.cs

@@ -38,7 +38,7 @@ public CookieBuilder Cookie
  public TimeSpan IdleTimeout { get; set; } = TimeSpan.FromMinutes(20);
 
  /// <summary>
- /// The maximim amount of time allowed to load a session from the store or to commit it back to the store.
+ /// The maximum amount of time allowed to load a session from the store or to commit it back to the store.
  /// Note this may only apply to asynchronous operations. This timeout can be disabled using <see cref="Timeout.InfiniteTimeSpan"/>.
  /// </summary>
  public TimeSpan IOTimeout { get; set; } = TimeSpan.FromMinutes(1);