rebase: bump github.com/aws/aws-sdk-go-v2/service/sts

Bumps [github.com/aws/aws-sdk-go-v2/service/sts](https://github.com/aws/aws-sdk-go-v2) from 1.18.0 to 1.18.1.
- [Release notes](https://github.com/aws/aws-sdk-go-v2/releases)
- [Changelog](https://github.com/aws/aws-sdk-go-v2/blob/main/CHANGELOG.md)
- [Commits](https://github.com/aws/aws-sdk-go-v2/compare/config/v1.18.0...config/v1.18.1)

---
updated-dependencies:
- dependency-name: github.com/aws/aws-sdk-go-v2/service/sts
  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-v2/service/sts/CHANGELOG.md

@@ -1,3 +1,7 @@
+# v1.18.1 (2023-01-23)
+
+* No change notes available for this release.
+
 # v1.18.0 (2023-01-05)
 
 * **Feature**: Add `ErrorCodeOverride` field to all error structs (aws/smithy-go#401).

vendor/github.com/aws/aws-sdk-go-v2/service/sts/go_module_metadata.go

@@ -3,4 +3,4 @@
 package sts
 
 // goModuleVersion is the tagged release for this module
-const goModuleVersion = "1.18.0"
+const goModuleVersion = "1.18.1"

vendor/github.com/aws/aws-sdk-go-v2/service/sts/internal/endpoints/endpoints.go

@@ -165,6 +165,9 @@ var defaultPartitions = endpoints.Partitions{
 			endpoints.EndpointKey{
 				Region: "ap-southeast-3",
 			}: endpoints.Endpoint{},
+			endpoints.EndpointKey{
+				Region: "ap-southeast-4",
+			}: endpoints.Endpoint{},
 			endpoints.EndpointKey{
 				Region: "aws-global",
 			}: endpoints.Endpoint{