[chore] Promote @bacherfl as triager (open-telemetry#36256)

<!--Ex. Fixing a bug - Describe the bug and how this fixes the issue.
Ex. Adding a feature - Explain what this achieves.-->
#### Description

Promote @bacherfl to triager.

- PRs reviewed:
https://github.com/open-telemetry/opentelemetry-collector-contrib/pulls?q=is%3Apr+reviewed-by%3Abacherfl+
- PRs authored:
https://github.com/open-telemetry/opentelemetry-collector-contrib/pulls?q=is%3Apr+author%3Abacherfl+
- Issues created:
https://github.com/open-telemetry/opentelemetry-collector-contrib/issues?q=is%3Aissue+author%3Abacherfl+
- Issues commented:
https://github.com/open-telemetry/opentelemetry-collector-contrib/issues?q=is%3Aissue+commenter%3Abacherfl+
- Commits:
https://github.com/open-telemetry/opentelemetry-collector-contrib/commits?author=bacherfl&since=2023-05-31&until=now

cc @open-telemetry/collector-triagers

README.md

@@ -70,6 +70,7 @@ See [CONTRIBUTING.md](CONTRIBUTING.md).
 Triagers ([@open-telemetry/collector-contrib-triagers](https://github.com/orgs/open-telemetry/teams/collector-contrib-triagers))
 
 - [Benedikt Bongartz](https://github.com/frzifus), Red Hat
+- [Florian Bacher](https://github.com/bacherfl), Dynatrace
 - [Jared Tan](https://github.com/JaredTan95), DaoCloud
 - [Murphy Chen](https://github.com/Frapschen), DaoCloud
 - [Paulo Janotti](https://github.com/pjanotti), Splunk