RFR: 8330279: Typo in `java.text.Bidi` class description

[Naoto Sato]

Fixing a typo in the javadoc

-------------

Commit messages:
 - initial commit

Changes: https://git.openjdk.org/jdk/pull/18788/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=18788&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8330279
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/18788.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18788/head:pull/18788

PR: https://git.openjdk.org/jdk/pull/18788