Bump testcontainers from 1.15.3 to 1.16.0 (#536)

Bumps [spock](https://github.com/testcontainers/testcontainers-java) from 1.15.3 to 1.16.0.
- [Release notes](https://github.com/testcontainers/testcontainers-java/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-java/blob/master/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-java@1.15.3...1.16.0)

---
updated-dependencies:
- dependency-name: org.testcontainers:spock
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

docs-examples/example-groovy/build.gradle

@@ -10,7 +10,7 @@ dependencies {
     testImplementation "io.swagger.core.v3:swagger-annotations"
     testImplementation "io.micronaut.beanvalidation:micronaut-hibernate-validator"
     testCompileOnly "io.micronaut:micronaut-inject-groovy"
-    testImplementation "org.testcontainers:spock:1.15.3"
+    testImplementation "org.testcontainers:spock:1.16.0"
     testImplementation("org.spockframework:spock-core") {
         exclude group: "org.codehaus.groovy", module: "groovy-all"
     }