build(deps): bump datadog from 0.47.0 to 0.48.0 in /backend (#2218)

Bumps [datadog](https://github.com/DataDog/datadogpy) from 0.47.0 to 0.48.0.
- [Release notes](https://github.com/DataDog/datadogpy/releases)
- [Changelog](https://github.com/DataDog/datadogpy/blob/master/CHANGELOG.md)
- [Commits](DataDog/datadogpy@v0.47.0...v0.48.0)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

backend/requirements.txt

@@ -1,6 +1,6 @@
 -e ../tools #egg=code-coverage-tools
 connexion==2.14.2
-datadog==0.47.0
+datadog==0.48.0
 Flask==2.2.3
 Flask-Cors==4.0.0
 flask-talisman==1.1.0