Fix Latin abbreviation format in TeamsSettings documentation

[Copilot]

Corrects the abbreviation "ie" to "i.e." with proper periods in the XML documentation comment for the ClientSecret property.

Changes:

• Updated line 16 in TeamsSettings.cs: Changed /// The secret (ie password) to /// The secret (i.e. password)

/// <summary>
/// The secret (i.e. password) for your application.
/// </summary>
public string? ClientSecret { get; set; }

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