Fix missing ignoreTitle property declaration in htmx.config

[Telroshan]

This option was introduced by c230931 which also added documentation for it, but it seems it was forgotten from the htmx.config object iself
That documentation itself states the following:

defaults to false, if set to true htmx will not update the title of the document when a title tag is found in new content

So I simply added that default value of false in the config

[xhaggi]

This option is also missing from the type defs. Would you mind adding it there too?

[Telroshan]

Thx I had forgotten about this file @xhaggi, I'll add it asap