RFR: 8350476: Fix typo introduced in JDK-8350147

[Bradford Wetmore]

Typo: s/ficticious/fictitious/ 

No unit test.  Check that javadoc still builds.

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Commit messages:
 - 8350476: Fix typo introduced in JDK-8350147

Changes: https://git.openjdk.org/jdk/pull/23733/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=23733&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8350476
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/23733.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23733/head:pull/23733

PR: https://git.openjdk.org/jdk/pull/23733