feat(deps): bump opentelemetry-exporter-otlp from 1.15.0 to 1.18.0

Bumps [opentelemetry-exporter-otlp](https://github.com/open-telemetry/opentelemetry-python) from 1.15.0 to 1.18.0.
- [Release notes](https://github.com/open-telemetry/opentelemetry-python/releases)
- [Changelog](https://github.com/open-telemetry/opentelemetry-python/blob/main/CHANGELOG.md)
- [Commits](open-telemetry/opentelemetry-python@v1.15.0...v1.18.0)

---
updated-dependencies:
- dependency-name: opentelemetry-exporter-otlp
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

requirements.txt

@@ -5,7 +5,7 @@ isodate==0.6.1
 lxml==4.9.2
 nowplaypadgen==0.4.9
 opentelemetry-api==1.15.0
-opentelemetry-exporter-otlp==1.15.0
+opentelemetry-exporter-otlp==1.18.0
 opentelemetry-sdk==1.15.0
 pylast==5.1.0
 pytz==2023.3