Bump the search-backend-containers group

Bumps the search-backend-containers group in /build/container/search-backend with 2 updates: opensearchproject/opensearch and elastic/elasticsearch.


Updates `opensearchproject/opensearch` from 3.0.0 to 3.1.0

Updates `elastic/elasticsearch` from 9.0.2 to 9.0.3

---
updated-dependencies:
- dependency-name: opensearchproject/opensearch
  dependency-version: 3.1.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: search-backend-containers
- dependency-name: elastic/elasticsearch
  dependency-version: 9.0.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: search-backend-containers
...

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

Author: dependabot[bot]

build/container/search-backend/amazon-opensearch-serverless.Dockerfile

@@ -4,4 +4,4 @@
 # IMPORTANT! When updating the version of OpenSearch in this Dockerfile,
 # make sure to update `version.org.opensearch.latest` property in a POM file,
 # and to update the version in opensearch.Dockerfile as well.
-FROM docker.io/opensearchproject/opensearch:3.0.0
+FROM docker.io/opensearchproject/opensearch:3.1.0

build/container/search-backend/elastic.Dockerfile

@@ -5,4 +5,4 @@
 #  * update `version.org.elasticsearch.latest` property in a POM file.
 #  * update the tags for 'elasticsearch-current' and 'elasticsearch-next' builds in ci/dependency-update/Jenkinsfile
 #
-FROM docker.io/elastic/elasticsearch:9.0.2
+FROM docker.io/elastic/elasticsearch:9.0.3

build/container/search-backend/opensearch.Dockerfile

@@ -4,4 +4,4 @@
 # IMPORTANT! When updating the version of OpenSearch in this Dockerfile,
 # make sure to update `version.org.opensearch.latest` property in a POM file,
 # and to update the version in amazon-opensearch-serverless.Dockerfile as well.
-FROM docker.io/opensearchproject/opensearch:3.0.0
+FROM docker.io/opensearchproject/opensearch:3.1.0