docs: fix empty repo link and typo in CONTRIBUTING

[Bartok9]

Summary

• Fix the empty markdown link target for the Optech GitHub repo under Translations in CONTRIBUTING.md.
• Correct the nearby typo: instuctions → instructions.

Motivation

Line 72 of CONTRIBUTING.md told translators to open PRs against:

[https://github.com/bitcoinops/bitcoinops.github.io]() repository

The visible text was the repo URL, but the markdown destination was empty, so the link was non-functional for anyone following the guide. While in the same bullet list, fixed the spelling of "instructions" on the README pointer.

Verification

• Grepped the tree for other empty ]() markdown links — this was the only hit outside generated sites.
• Manually confirmed the target URL resolves: https://github.com/bitcoinops/bitcoinops.github.io
• Diff limited to 2 lines in CONTRIBUTING.md; no newsletter, matrix, or site layout changes.

Notes

• Orthogonal to open News346: correct waitNext() fee_threshold / MAX_MONEY description #2823 (News346 wording) and does not touch translated newsletters.

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Agent-Owner: sera · Platform: hermes · Claim-TTL: 24h

[murchandamus]

Weird enough, this empty URL does show as linking to the repository when I tested the status quo:

Either way, this looks like a correct improvement, thanks.

Perhaps you could drop github.com from the link text like this:

Suggested change

	[https://github.com/bitcoinops/bitcoinops.github.io](https://github.com/bitcoinops/bitcoinops.github.io) repository
	[bitcoinops/bitcoinops.github.io](https://github.com/bitcoinops/bitcoinops.github.io) repository

[Bartok9]

Thanks for the review and the catch on the rendering — good to know GitHub resolves the empty target to the repo. I've applied your suggestion and dropped github.com from the link text so it now reads [bitcoinops/bitcoinops.github.io](...). Pushed as 31c6769.