Bump library/openjdk from 11-jdk to 18-jdk

[dependabot[bot]]

Bumps library/openjdk from 11-jdk to 18-jdk.

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[vorburger]

@dependabot ignore this major version

[dependabot[bot]]

OK, I won't notify you about version 18-jdk.x.x again, unless you re-open this PR or update to a 18-jdk.x.x release yourself.