Bump powertools-metrics

Bumps [powertools-metrics](https://github.com/awslabs/aws-lambda-powertools-java) from 1.3.0 to 1.4.0.
- [Release notes](https://github.com/awslabs/aws-lambda-powertools-java/releases)
- [Changelog](https://github.com/awslabs/aws-lambda-powertools-java/blob/master/CHANGELOG.md)
- [Commits](aws-powertools/powertools-lambda-java@v1.3.0...v1.4.0)

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

Author: dependabot[bot]

templates/java8/cookiecutter-aws-sam-hello-powertools-java-gradle/{{ cookiecutter.project_slug }}/HelloWorldFunction/build.gradle

@@ -14,7 +14,7 @@ dependencies {
     implementation 'software.amazon.lambda:powertools-logging:1.3.0'
     aspectpath 'software.amazon.lambda:powertools-logging:1.3.0'
 
-    implementation 'software.amazon.lambda:powertools-metrics:1.3.0'
+    implementation 'software.amazon.lambda:powertools-metrics:1.4.0'
     aspectpath 'software.amazon.lambda:powertools-metrics:1.3.0'
 
     implementation 'com.amazonaws:aws-lambda-java-core:1.2.1'