private/protocol/rest: Fix typo in build.go
Cleans up documentation typo
@@ -98,7 +98,7 @@ func buildLocationElements(r *request.Request, v reflect.Value, buildGETQuery bo
// Support the ability to customize values to be marshaled as a
// blob even though they were modeled as a string. Required for S3
- // API operations like SSECustomerKey is modeled as stirng but
+ // API operations like SSECustomerKey is modeled as string but
// required to be base64 encoded in request.
if field.Tag.Get("marshal-as") == "blob" {
m = m.Convert(byteSliceType)
