RFR: 8369027: Apply java.io.Serial annotations in java.scripting

[Sergey Bylokhov]

Please review the application of the `@Serial` annotation ([JDK-8202385](https://bugs.openjdk.org/browse/JDK-8202385)) to types in the java.scripting module to enable stricter compile-time checking of serialization-related declarations.

The patch is trivial, only one class needs to be updated.

Example of a similar change https://github.com/openjdk/jdk/pull/26208.

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Commit messages:
 - 8369027: Apply java.io.Serial annotations in java.scripting

Changes: https://git.openjdk.org/jdk/pull/27599/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=27599&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8369027
  Stats: 3 lines in 1 file changed: 3 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/27599.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27599/head:pull/27599

PR: https://git.openjdk.org/jdk/pull/27599