RFR: 8035: Update Java version in GHA workflow to 11.0.18 [v3]

[Christoph Langer]

> We can bump the GHA JDK to 11.0.18.

Christoph Langer has updated the pull request incrementally with one additional commit since the last revision:

  Update Datadog copyright year

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Changes:
  - all: https://git.openjdk.org/jmc/pull/465/files
  - new: https://git.openjdk.org/jmc/pull/465/files/ed5388c7..600c235d

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jmc&pr=465&range=02
 - incr: https://webrevs.openjdk.org/?repo=jmc&pr=465&range=01-02

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jmc/pull/465.diff
  Fetch: git fetch https://git.openjdk.org/jmc pull/465/head:pull/465

PR: https://git.openjdk.org/jmc/pull/465