[jdk21u-dev] RFR: 8341684: Typo in External Specifications link of java.util.Currency

[Goetz Lindenmaier]

Trivial and obvious fix of the documentation of Currency.

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Commit messages:
 - Backport e7045e9399c5bca0592afc5769432414ecae7219

Changes: https://git.openjdk.org/jdk21u-dev/pull/1969/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1969&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8341684
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1969.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1969/head:pull/1969

PR: https://git.openjdk.org/jdk21u-dev/pull/1969