docs: correct Github typo across whole website

[Uaitt]

Github should actually be written as GitHub. This typo appears in many places across the whole website, even in different translations.

That's why there are many files changed :)

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[github-actions]

This issue is stale because it has been open 30 days with no activity.

[wackerow]

Hey @Uaitt! Sorry for delay here.. appreciate this polish.

We've ended up with a bunch of merge conflicts, but they're primarily from the non-English version of these pages.

For context, a translation pipeline is being implemented for the site which will soon be run to generate a fresh set of translations based on the English. Subsequent to that it should detect changes to the English that keeps the rest up to date, and we'll be mostly hands-off the non-English content files.

As such, I would recommend we revert the changes to the non-English files in here, and keep it to English only. The changes won't propagate to non-English immediately, but will be coming shortly. That should bring the diff down to about five (5) files -- I can help take care of that to get this over the line.

---

If you're curious, when the translations are run again, the other files should be corrected with the new setup, enforced with the following:

ethereum-org-website/src/scripts/intl-pipeline/intl-sanitizer.ts

Lines 744 to 754 in f027e11

	/**
	* Fix case-sensitive brand capitalization mistakes.
	*
	* Maps wrong-case variants to canonical forms. Skips URLs (github.com etc.)
	* and code blocks. Only matches standalone occurrences (not inside URLs).
	*/
	const BRAND_CAPITALIZATION_FIXES: Record<string, string> = {
	Metamask: "MetaMask",
	Github: "GitHub",
	}

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[wackerow]

Went ahead and reverted the non-English changes. Thanks again @Uaitt ! Pulling in

[wackerow]

@all-contributors please add @Uaitt for bug fix

[allcontributors]

@wackerow

@Uaitt already contributed before to bug