[DOC] Udpate link to membership document (#3452)

Author: ThomsonTan

README.md

@@ -84,15 +84,15 @@ doc](https://docs.google.com/document/d/1i1E4-_y4uJ083lCutKGDhkpi3n4_e774SBLi9hP
 For edit access, get in touch on
 [Slack](https://cloud-native.slack.com/archives/C01N3AT62SJ).
 
-[Maintainers](https://github.com/open-telemetry/community/blob/main/community-membership.md#maintainer)
+[Maintainers](https://github.com/open-telemetry/community/blob/main/guides/contributor/membership.md#maintainer)
 ([@open-telemetry/cpp-maintainers](https://github.com/orgs/open-telemetry/teams/cpp-maintainers)):
 
 * [Ehsan Saei](https://github.com/esigo)
 * [Lalit Kumar Bhasin](https://github.com/lalitb), Microsoft
 * [Marc Alff](https://github.com/marcalff), Oracle
 * [Tom Tan](https://github.com/ThomsonTan), Microsoft
 
-[Approvers](https://github.com/open-telemetry/community/blob/main/community-membership.md#approver)
+[Approvers](https://github.com/open-telemetry/community/blob/main/guides/contributor/membership.md#approver)
 ([@open-telemetry/cpp-approvers](https://github.com/orgs/open-telemetry/teams/cpp-approvers)):
 
 * [Doug Barker](https://github.com/dbarker)
@@ -101,7 +101,7 @@ For edit access, get in touch on
 * [WenTao Ou](https://github.com/owent), Tencent
 
 [Emeritus
-Maintainer/Approver/Triager](https://github.com/open-telemetry/community/blob/main/community-membership.md#emeritus-maintainerapprovertriager):
+Maintainer/Approver/Triager](https://github.com/open-telemetry/community/blob/main/guides/contributor/membership.md#emeritus-maintainerapprovertriager):
 
 * [Alolita Sharma](https://github.com/alolita)
 * [Emil Mikulic](https://github.com/g-easy)