Bump newrelic from 10.3.1 to 10.4.0

Bumps [newrelic](https://github.com/newrelic/newrelic-python-agent) from 10.3.1 to 10.4.0.
- [Release notes](https://github.com/newrelic/newrelic-python-agent/releases)
- [Commits](newrelic/newrelic-python-agent@v10.3.1...v10.4.0)

---
updated-dependencies:
- dependency-name: newrelic
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements/dev.txt

@@ -147,7 +147,7 @@ netaddr==1.3.0
     # via
     #   -r requirements/requirements.txt
     #   checkmatelib
-newrelic==10.3.1
+newrelic==10.4.0
     # via -r requirements/requirements.txt
 oauthlib==3.2.2
     # via