Fix Christopher Yates team member not loading

[Copilot]

Christopher Yates' profile was not appearing on the team page due to missing .md extension on the content file.

Changes

• Renamed phd-christopher-yates → phd-christopher-yates.md (Astro content loader requires .md/.mdx extension per src/content.config.ts:58)
• Fixed avatar path: phd-Chris-Yates.jpg → phd-Chris-Yates.png (matches actual asset)
• Corrected GitHub URL: removed duplicate https:// protocol prefix

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:

• telemetry.astro.build
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node node /home/REDACTED/work/Liuzlab.github.io/Liuzlab.github.io/node_modules/.bin/astro build (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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[Copilot]

Pull request overview

Fixes a missing team profile entry by aligning the team content file and its frontmatter fields with the Astro content collection requirements for the team collection.

Changes:

• Ensures the team member content is a .md file so it’s picked up by the src/content/team glob loader.
• Updates the avatar reference to the correct existing asset (phd-Chris-Yates.png).
• Corrects the GitHub URL by removing a duplicated protocol prefix.

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