[docs] Add status Header for Oauth2clientextension (#10297)

* [extension/Oauth2ClientExtension] Add status Header for Oauth2clientextension

* Removed the pipelines section as this is an extension.

* fixed checklinks issue

extension/oauth2clientauthextension/README.md

@@ -1,5 +1,11 @@
 # Authenticator - OAuth2 Client Credentials
 
+| Status                   |                       |
+| ------------------------ |-----------------------|
+| Stability                | [beta]                |
+| Distributions            | [contrib]             |
+
+
 This extension provides OAuth2 Client Credentials flow authenticator for HTTP and gRPC based exporters. The extension
 fetches and refreshes the token after expiry automatically. For further details about OAuth2 Client Credentials flow (2-legged workflow)
 refer https://datatracker.ietf.org/doc/html/rfc6749#section-4.4.
@@ -65,4 +71,7 @@ Following are the configuration fields
 - [**timeout**](https://golang.org/src/net/http/client.go#L90) -  **Optional** specifies the timeout on the underlying client to authorization server for fetching the tokens (initial and while refreshing).
   This is optional and not setting this configuration implies there is no timeout on the client.
 
-For more information on client side TLS settings, see [configtls README](../../config/configtls/README.md).
+For more information on client side TLS settings, see [configtls README](https://github.com/open-telemetry/opentelemetry-collector/tree/main/config/configtls).
+
+[beta]: https://github.com/open-telemetry/opentelemetry-collector#beta
+[contrib]: https://github.com/open-telemetry/opentelemetry-collector-releases/tree/main/distributions/otelcol-contrib