Add lmolkova to approvers (open-telemetry#3960)

* Add lmolkova to approvers

* Update README.md

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Co-authored-by: Riccardo Magliocchetti <riccardo.magliocchetti@gmail.com>

Author: sightseeker

README.md

@@ -124,6 +124,7 @@ For more information about the maintainer role, see the [community repository](h
 - [Dylan Russell](https://github.com/dylanrussell), Google
 - [Emídio Neto](https://github.com/emdneto), PicPay
 - [Jeremy Voss](https://github.com/jeremydvoss), Microsoft
+- [Liudmila Molkova](https://github.com/lmolkova), Grafana Labs
 - [Owais Lone](https://github.com/owais), Splunk
 - [Pablo Collins](https://github.com/pmcollins), Splunk
 - [Sanket Mehta](https://github.com/sanketmehta28), Cisco