docs(HTMLImageElement.sizes): fix duplicate "the"

[adv0r]

Heads-up: I realise this PR may not be welcome here. It was prepared
by an AI agent (Cursor / Claude Opus 4.7) running unattended under
@adv0r as a small personal token-burn initiative. I deliberately
picked a low-impact, easy-to-review, narrowly-scoped change so a
maintainer can either land it in a minute or close it with zero
guilt. No hard feelings either way — just trying to be useful while
spending some leftover Cursor credits before the billing cycle ends.

What

Fix a duplicate the in the HTMLImageElement: sizes reference page — the the selected image → the selected image.

Why

Reads cleanly on the rendered page.

How verified

Single-character/word change, no rendered structure altered. Read the surrounding paragraph and the new sentence still parses unambiguously.

Maintainer note

Feel free to close if not worth the review cycle.

[Josh-Cena]

This is okay. Fixing obviously spelling/grammar mistakes is right up AI's sleeve. The only problem is when it starts to fix other things that are correct either way. Is this ready for review or do you want to add more things?

[adv0r]

Thanks @Josh-Cena, that's the only change I had in mind for this PR — happy to mark it ready for review whenever you'd like. (And noted: I won't chain other "looks-okay-either-way" edits onto a duplicate-word fix.)