rebase: bump github.com/aws/aws-sdk-go from 1.44.220 to 1.44.249

Bumps [github.com/aws/aws-sdk-go](https://github.com/aws/aws-sdk-go) from 1.44.220 to 1.44.249.
- [Release notes](https://github.com/aws/aws-sdk-go/releases)
- [Commits](https://github.com/aws/aws-sdk-go/compare/v1.44.220...v1.44.249)

---
updated-dependencies:
- dependency-name: github.com/aws/aws-sdk-go
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

vendor/github.com/aws/aws-sdk-go/private/protocol/restjson/unmarshal_error.go

@@ -45,7 +45,7 @@ func (u *UnmarshalTypedError) UnmarshalError(
 	msg := resp.Header.Get(errorMessageHeader)
 
 	body := resp.Body
-	if len(code) == 0 {
+	if len(code) == 0 || len(msg) == 0 {
 		// If unable to get code from HTTP headers have to parse JSON message
 		// to determine what kind of exception this will be.
 		var buf bytes.Buffer
@@ -57,7 +57,9 @@ func (u *UnmarshalTypedError) UnmarshalError(
 		}
 
 		body = ioutil.NopCloser(&buf)
-		code = jsonErr.Code
+		if len(code) == 0 {
+			code = jsonErr.Code
+		}
 		msg = jsonErr.Message
 	}