Bump software.amazon.awssdk:bom from 2.27.19 to 2.27.21

Bumps software.amazon.awssdk:bom from 2.27.19 to 2.27.21.

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

Signed-off-by: dependabot[bot] <support@github.com>

pom.xml

@@ -100,7 +100,7 @@
       <dependency>
         <groupId>software.amazon.awssdk</groupId>
         <artifactId>bom</artifactId>
-        <version>2.27.19</version>
+        <version>2.27.21</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>