Fix contributor names and teams (#8)

Fixed the team names, some links, as well as @MovieStoreGuy's and my
name 🙂

README.md

@@ -27,24 +27,22 @@ The documentation currently resides in the previous folders, e.g.
 
 See [CONTRIBUTING.md](CONTRIBUTING.md)
 
-Approvers ([@open-telemetry/java-approvers](https://github.com/orgs/open-telemetry/teams/java-approvers)):
+Approvers ([@open-telemetry/specs-semconv-approvers](https://github.com/orgs/open-telemetry/teams/specs-semconv-approvers)):
 
 - [Christian Neumüller](https://github.com/Oberon00), Dynatrace
 - [James Moessis](https://github.com/jamesmoessis), Atlassian
 - [Joao Grassi](https://github.com/joaopgrassi), Dynatrace
 - [Johannes Tax](https://github.com/pyohannes), Microsoft
 - [Liudmila Molkova](https://github.com/lmolkova), Microsoft
-- [Sean Marcinak](https://github.com/MovieStoreGuy), Atlassian
+- [Sean Marciniak](https://github.com/MovieStoreGuy), Atlassian
 - [Ted Young](https://github.com/tedsuo), Lightstep
 
 *Find more about the approver role in [community repository](https://github.com/open-telemetry/community/blob/master/community-membership.md#approver).*
 
-Maintainers ([@open-telemetry/java-maintainers](https://github.com/orgs/open-telemetry/teams/java-maintainers)):
-
-- [Josh Suereth](github.com/jsuereth)
-- [Armin Reuch](github.com/arminru)
-- [Reiley Yang](github.com/reyang)
+Maintainers (subset of [@open-telemetry/technical-committee](https://github.com/orgs/open-telemetry/teams/technical-committee)):
 
+- [Josh Suereth](https://github.com/jsuereth)
+- [Armin Ruech](https://github.com/arminru)
+- [Reiley Yang](https://github.com/reyang)
 
 *Find more about the maintainer role in [community repository](https://github.com/open-telemetry/community/blob/master/community-membership.md#maintainer).*
-