Consider replace type parameter for method at TextExtensions

[rstm-sf]

Consider replace type parameter for method at TextExtensions.

https://github.com/QuestPDF/QuestPDF/blob/b87e8d5d4e47325d7843931ef00a394c368e810f/QuestPDF/Fluent/TextExtensions.cs#L284-L289

-public static TextSpanDescriptor Text(this IContainer element, object? text)
+public static TextSpanDescriptor Text(this IContainer element, string? text)

It seems to me that the user of the library must explicitly call .ToString(). This is necessary to understand what happens if we pass a custom object without an overridden .ToString()