read me changes to point to GA release docs (#6248)
read me changes to point to GA release docs (#6248)

readme changes to point to GA release docs.

navalev/azure-sdk-for-java,navalev/azure-sdk-for-java,Azure/azure-sdk-for-java,selvasingh/azure-sdk-for-java,navalev/azure-sdk-for-java,Azure/azure-sdk-for-java,navalev/azure-sdk-for-java,Azure/azure-sdk-for-java,Azure/azure-sdk-for-java,Azure/azure-sdk-for-java,navalev/azure-sdk-for-java,selvasingh/azure-sdk-for-java,selvasingh/azure-sdk-for-java