Fix a bug if there are multiple volume tags

We cannot take the address of a range iteration variable because the
address of that will be the same.

pkg/cloud/cloud.go

@@ -279,7 +279,9 @@ func (c *cloud) CreateDisk(ctx context.Context, volumeName string, diskOptions *
 
 	var tags []*ec2.Tag
 	for key, value := range diskOptions.Tags {
-		tags = append(tags, &ec2.Tag{Key: &key, Value: &value})
+		copiedKey := key
+		copiedValue := value
+		tags = append(tags, &ec2.Tag{Key: &copiedKey, Value: &copiedValue})
 	}
 	tagSpec := ec2.TagSpecification{
 		ResourceType: aws.String("volume"),