[jdk17u-dev] RFR: 8345371: Bump update version for OpenJDK: jdk-17.0.15

[Goetz Lindenmaier]

The required version bump

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Commit messages:
 - 8345371: Bump update version for OpenJDK: jdk-17.0.15

Changes: https://git.openjdk.org/jdk17u-dev/pull/3085/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=3085&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8345371
  Stats: 3 lines in 2 files changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/3085.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/3085/head:pull/3085

PR: https://git.openjdk.org/jdk17u-dev/pull/3085