RFR: 8374345: Restore the original copyright year in ExtremeFontSizeTest.java

[Alexey Ivanov]

The copyright year in `test/jdk/java/awt/FontMetrics/ExtremeFontSizeTest.java` was replaced from 2024 to 2025 instead of adding 2025 by [JDK-8357672](https://bugs.openjdk.org/browse/JDK-8357672).

Restore the original year in the copyright header.

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Commit messages:
 - 8374345: Restore the original copyright year in ExtremeFontSizeTest.java

Changes: https://git.openjdk.org/jdk/pull/28983/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=28983&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8374345
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/28983.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28983/head:pull/28983

PR: https://git.openjdk.org/jdk/pull/28983