Bump software.amazon.awssdk:sts from 2.20.92 to 2.21.0 (#2387)

Bumps software.amazon.awssdk:sts from 2.20.92 to 2.21.0.

---
updated-dependencies:
- dependency-name: software.amazon.awssdk:sts
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

settings.gradle.kts

@@ -52,7 +52,7 @@ dependencyResolutionManagement {
             library("aws-starter", "io.awspring.cloud:spring-cloud-aws-starter:3.0.2")
             library("aws-sns", "io.awspring.cloud:spring-cloud-aws-starter-sns:3.0.2")
             library("aws-sqs", "io.awspring.cloud:spring-cloud-aws-starter-sqs:3.0.2")
-            library("aws-sts", "software.amazon.awssdk:sts:2.20.92")
+            library("aws-sts", "software.amazon.awssdk:sts:2.21.0")
             bundle("aws-messaging", listOf("aws-autoconfigure", "aws-starter", "aws-sns", "aws-sqs", "aws-sts"))
             library("mockito-kotlin", "org.mockito.kotlin:mockito-kotlin:5.1.0")
             library("mockito-inline", "org.mockito:mockito-inline:5.2.0")