HDDS-12838. Bump awssdk to 2.31.21 (apache#8267)

Author: dependabot[bot]

pom.xml

@@ -36,7 +36,7 @@
     <aspectj.version>1.9.7</aspectj.version>
     <assertj.version>3.27.3</assertj.version>
     <aws-java-sdk.version>1.12.661</aws-java-sdk.version>
-    <aws-java-sdk2.version>2.31.16</aws-java-sdk2.version>
+    <aws-java-sdk2.version>2.31.21</aws-java-sdk2.version>
     <bonecp.version>0.8.0.RELEASE</bonecp.version>
     <bouncycastle.version>1.80</bouncycastle.version>
     <build-helper-maven-plugin.version>3.6.0</build-helper-maven-plugin.version>