Bump github.com/Azure/azure-sdk-for-go/sdk/azcore from 1.14.0 to 1.16.0 in /provider/azappconfig in the azure-sdk-for-go group

Bump github.com/Azure/azure-sdk-for-go/sdk/azcore from 1.14.0 to 1.16.0 in /provider/azappconfig in the azure-sdk-for-go group #1055