Bump awsSdkVersion from 2.16.20 to 2.16.21

Bumps `awsSdkVersion` from 2.16.20 to 2.16.21.

Updates `auth` from 2.16.20 to 2.16.21

Updates `core` from 2.16.20 to 2.16.21
- [Release notes](https://github.com/aws/aws-sdk-java-v2/releases)
- [Changelog](https://github.com/aws/aws-sdk-java-v2/blob/master/CHANGELOG.md)
- [Commits](aws/aws-sdk-java-v2@2.16.20...2.16.21)

Updates `profiles` from 2.16.20 to 2.16.21

Updates `regions` from 2.16.20 to 2.16.21

Updates `utils` from 2.16.20 to 2.16.21
- [Release notes](https://github.com/aws/aws-sdk-java-v2/releases)
- [Changelog](https://github.com/aws/aws-sdk-java-v2/blob/master/CHANGELOG.md)
- [Commits](aws/aws-sdk-java-v2@2.16.20...2.16.21)

Updates `kinesis` from 2.16.20 to 2.16.21

Updates `netty-nio-client` from 2.16.20 to 2.16.21

Updates `sqs` from 2.16.20 to 2.16.21

Updates `s3` from 2.16.20 to 2.16.21

Signed-off-by: dependabot[bot] <[email protected]>

build.gradle

@@ -10,7 +10,7 @@ buildscript {
 }
 
 ext {
-    awsSdkVersion = "2.16.20"
+    awsSdkVersion = "2.16.21"
     springVersion = "5.3.5"
     springSecurityVersion = "5.4.5"
     springBootVersion = "2.4.3"