RFR: 8330624: Inconsistent use of semicolon in the code snippet of java.io.Serializable javadoc

[Korov]

Fix the description of java.io.Serializable.

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Commit messages:
 - Inconsistent use of semicolon in the code snippet of java.io.Serializable javadoc

Changes: https://git.openjdk.org/jdk/pull/18874/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=18874&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8330624
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/18874.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18874/head:pull/18874

PR: https://git.openjdk.org/jdk/pull/18874