Fix typos (#90)

Author: lucacome

cmd/sync/aws.go

@@ -47,7 +47,7 @@ func NewAWSClient(data []byte) (*AWSClient, error) {
 
 		region, err := metaClient.Region()
 		if err != nil {
-			return nil, fmt.Errorf("unable to retreive region from ec2metadata: %v", err)
+			return nil, fmt.Errorf("unable to retrieve region from ec2metadata: %v", err)
 		}
 		cfg.Region = region
 	}

examples/aws.md

@@ -40,7 +40,7 @@ upstreams:
 * The `api_endpoint` key defines the NGINX Plus API endpoint.
 * The `sync_interval_in_seconds` key defines the synchronization interval: nginx-asg-sync checks for scaling updates every 5 seconds.
 * The `cloud_provider` key defines a cloud provider that will be used. The default is `AWS`. This means the key can be empty if using AWS. Possible values are: `AWS`, `Azure`.
-* The `region` key defines the AWS region where we deploy NGINX Plus and the Auto Scaling groups. Setting `region` to `self` will use the EC2 Metadata service to retreive the region of the current instance.
+* The `region` key defines the AWS region where we deploy NGINX Plus and the Auto Scaling groups. Setting `region` to `self` will use the EC2 Metadata service to retrieve the region of the current instance.
 * The `upstreams` key defines the list of upstream groups. For each upstream group we specify:
   * `name` – The name we specified for the upstream block in the NGINX Plus configuration.
   * `autoscaling_group` – The name of the corresponding Auto Scaling group. Use of wildcards is supported. For example, `backend-*`.