Fix link to AWS Resources in README.md (#896)

*Issue #, if available:*

*Description of changes:*
update resource link in README.md since it has moved to
[opentelemetry-java-contrib](https://github.com/open-telemetry/opentelemetry-java-contrib)
repository

By submitting this pull request, I confirm that my contribution is made
under the terms of the Apache 2.0 license.

README.md

@@ -29,7 +29,7 @@ This configuration includes being able to reconfigure the [IdsGenerator](https:/
 which we need to support X-Ray compatible trace IDs. Because the SDK uses SPI, it is sufficient for
 the custom implementation to be on the classpath to be recognized. The AWS distribution of the
 OpenTelemetry Java Agent repackages the upstream agent by simply adding our SPI implementation for
-reconfiguring the ID generator. In addition, it includes [AWS resource providers](https://github.com/open-telemetry/opentelemetry-java/tree/main/sdk-extensions/aws/src/main/java/io/opentelemetry/sdk/extension/aws/resource) 
+reconfiguring the ID generator. In addition, it includes [AWS resource providers](https://github.com/open-telemetry/opentelemetry-java-contrib/tree/main/aws-resources/src/main/java/io/opentelemetry/contrib/aws/resource) 
 by default, and it sets a system property to configure the agent to use multiple trace ID propagators, 
 defaulting to maximum interoperability.