deps: Bump ironbank version to 9.7

[github-actions]

deps: Bump ironbank version

deps(ironbank): Bump ubi version to 9.7

changed lines [5] of file "/tmp/updatecli/github/elastic/logstash/docker/templates/IronbankDockerfile.erb"

deps(ironbank): Bump ubi version to 9.7

1 file(s) updated with "BASE_TAG: \"9.7\"": * docker/templates/hardening_manifest.yaml.erb

GitHub Action workflow link

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[mergify]

This pull request does not have a backport label. Could you fix it @github-actions[bot]? 🙏
To fixup this pull request, you need to add the backport labels for the needed
branches, such as:

• backport-8./d is the label to automatically backport to the 8./d branch. /d is the digit.
• If no backport is necessary, please add the backport-skip label

[elasticmachine]

💛 Build succeeded, but was flaky

• Buildkite Build
• Commit: 746eb97

Failed CI Steps

• :rspec: Ruby unit tests - FIPS mode
• 🥼 Integration Tests / part 3-of-6
• 🥼 Integration Tests / part 6-of-6