<i18n dev> RFR: 8305111: Locale.lookupTag has typo in parameter

[Justin Lu]

Small typo fix in Locale.lookupTag

_tangs_ should be _tags_

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Commit messages:
 - Fix typo

Changes: https://git.openjdk.org/jdk/pull/13235/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13235&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8305111
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/13235.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13235/head:pull/13235

PR: https://git.openjdk.org/jdk/pull/13235