Renovate: Bump abandonmentThreshold to two years

[tbradsha]

Proposed changes

Currently Renovate considers dependencies abandoned if there have been no updates in one year. That's a bit aggressive, so this bumps it to an also-arbitrary-but-more-forgiving two years.

Other information

• Generate changelog entries for this PR (using AI).

Related product discussion/links

• p1773694053673749-slack-C05Q5HSS013
• Docs: https://docs.renovatebot.com/configuration-options/#abandonmentthreshold

Does this pull request change what data or activity we track or use?

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[anomiex]

WFM