LibWeb: Extend the length of underline

[Arhcout]

Fix #1822.

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[ronak69]

This change does fix the issue. But do you know why it was an issue in the first place?

Why the need to extend the underline? (I don't know why it was already 1 pixel short at the end before)

I also trid to fix this and thought the bug might be in here:

ladybird/Userland/Libraries/LibWeb/Layout/InlineFormattingContext.cpp

Line 201 in 048b51e

void InlineFormattingContext::apply_justification_to_fragments(CSS::TextJustify text_justify, LineBox& line_box, bool is_last_line)