Add back @hectorhdzg to approvers (open-telemetry#4848)

Author: xrmx

README.md

@@ -112,6 +112,7 @@ 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
+- [Héctor Hernández](https://github.com/hectorhdzg), Microsoft
 - [Jeremy Voss](https://github.com/jeremydvoss), Microsoft
 - [Liudmila Molkova](https://github.com/lmolkova), Grafana Labs
 - [Owais Lone](https://github.com/owais), Splunk
@@ -139,7 +140,6 @@ For more information about the emeritus role, see the [community repository](htt
 - [Ashutosh Goel](https://github.com/ashu658)
 - [Carlos Alberto Cortez](https://github.com/carlosalberto)
 - [Christian Neumüller](https://github.com/Oberon00)
-- [Héctor Hernández](https://github.com/hectorhdzg)
 - [Mauricio Vásquez](https://github.com/mauriciovasquezbernal)
 - [Nathaniel Ruiz Nowell](https://github.com/NathanielRN)
 - [Nikolay Sokolik](https://github.com/oxeye-nikolay)