[jdk25u] RFR: 8372320: Bump update version for OpenJDK: jdk-25.0.3

[Goetz Lindenmaier]

The first change we need for 25.0.3 is to update the version.

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Commit messages:
 - 8372320: Bump update version for OpenJDK: jdk-25.0.3

Changes: https://git.openjdk.org/jdk25u/pull/383/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk25u&pr=383&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8372320
  Stats: 3 lines in 2 files changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk25u/pull/383.diff
  Fetch: git fetch https://git.openjdk.org/jdk25u.git pull/383/head:pull/383

PR: https://git.openjdk.org/jdk25u/pull/383