Bump aws-java-sdk-signer from 1.12.395 to 1.12.400

Bumps [aws-java-sdk-signer](https://github.com/aws/aws-sdk-java) from 1.12.395 to 1.12.400.
- [Release notes](https://github.com/aws/aws-sdk-java/releases)
- [Changelog](https://github.com/aws/aws-sdk-java/blob/master/CHANGELOG.md)
- [Commits](aws/aws-sdk-java@1.12.395...1.12.400)

---
updated-dependencies:
- dependency-name: com.amazonaws:aws-java-sdk-signer
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

pom.xml

@@ -315,7 +315,7 @@
         <dependency>
             <groupId>com.amazonaws</groupId>
             <artifactId>aws-java-sdk-signer</artifactId>
-            <version>1.12.395</version>
+            <version>1.12.400</version>
         </dependency>
         <dependency>
             <groupId>javax.ws.rs</groupId>