Bump software.amazon.awssdk:bom from 2.20.153 to 2.21.40 (#17616)

Bumps software.amazon.awssdk:bom from 2.20.153 to 2.21.40.

---
updated-dependencies:
- dependency-name: software.amazon.awssdk:bom
  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>
Co-authored-by: Bernd Ahlers <bernd@users.noreply.github.com>

pom.xml

@@ -99,7 +99,7 @@
         <auto-value.version>1.10.4</auto-value.version>
         <auto-value-javabean.version>2.5.2</auto-value-javabean.version>
         <aws-java-sdk-1.version>1.12.607</aws-java-sdk-1.version>
-        <aws-java-sdk-2.version>2.20.153</aws-java-sdk-2.version>
+        <aws-java-sdk-2.version>2.21.40</aws-java-sdk-2.version>
         <aws-kinesis-client.version>2.2.10</aws-kinesis-client.version>
         <aws-msk-iam-auth.version>2.0.1</aws-msk-iam-auth.version>
         <bouncycastle.version>1.77</bouncycastle.version>