Convert 10x tutorial info box to warning directive

[Copilot]

The 10x Genomics V(D)J tutorial uses an outdated workflow. The existing blue info box was too subtle for users to notice they should use the newer tutorial instead.

Changes

• Changed .. admonition:: New to .. warning:: in docs/examples/10x.rst
• Prepended "This is an old tutorial." to the warning text

Result

The warning now renders in orange/yellow with standard warning iconography instead of blue informational styling:

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:

• docs.python.org
  • Triggering command: /home/REDACTED/.local/bin/sphinx-build sphinx-build -a -E -b html -d _build/doctrees . _build/html (dns block)
• immcantation.readthedocs.io
  • Triggering command: /home/REDACTED/.local/bin/sphinx-build sphinx-build -a -E -b html -d _build/doctrees . _build/html (dns block)
• presto.readthedocs.io
  • Triggering command: /home/REDACTED/.local/bin/sphinx-build sphinx-build -a -E -b html -d _build/doctrees . _build/html (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)

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Update the 10x example to warn this is an old example</issue_title>
<issue_description>Update the documentation https://changeo.readthedocs.io/en/stable/examples/10x.html to make it more clear that this is an old tutorial. The blue box should be a warning.</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Update the 10x example to warn this is an old example #222

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.