NewRelic supports PHP 8.3.

[damienmckenna]

Closes #8840.

Summary

Updates https://docs.pantheon.io/guides/php to remove the warning about NewRelic and PHP 8.3.

Effect

The following changes are already committed:

• Updates https://docs.pantheon.io/guides/php to remove the warning about NewRelic and PHP 8.3.

Dependencies and Timing

• NewRelic client upgraded to v10.15.04

Release:

• When ready
• After date: $DATE

---

Post Launch

Do not remove - To be completed by the docs team upon merge:

• Redirect /old-path/ => /new-path/ (if applicable)
• Include/exclude pages ^ respectively within docs search service provider (if applicable)
• For Heroes - add a props post to the discussion board.
• Remove from the project board

[rachelwhitton]

Thanks for the PR!

Holding for release until upcoming engineering work has been completed

[rachelwhitton]

Thanks! We merged this into #8950

[damienmckenna]

That's great news, thank you!