fix: update broken CoinMarketCap URL from alexandria to academy

[Copilot]

Updates the broken CoinMarketCap URL in two documentation files that were causing 404 errors during link checking. The URL path has changed from /alexandria/ to /academy/ on CoinMarketCap's website.

Files updated:

• learn/how-celestia-works/data-availability-layer.md (line 8)
• learn/how-celestia-works/overview.md (line 19)

Changes made:

• https://coinmarketcap.com/alexandria/article/what-is-data-availability → https://coinmarketcap.com/academy/article/what-is-data-availability

The fix maintains the existing markdown formatting and link text while only updating the URL path. This resolves the link checker errors that were preventing successful CI builds.

Fixes #2239.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• coinmarketcap.com
  • Triggering command: curl -I REDACTED (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

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[jcstein]

thx robot

[github-actions]

PR Preview Action v1.6.2
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2025-09-19 17:03 UTC