[jdk21u-dev] RFR: 8259540: MissingResourceException for key cvc-complex-type.2.4.d.1

[Alexey Bakhtin]

Backport of a simple fix for missing `cvc-complex-type.2.4.d.1` error string resource

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Commit messages:
 - Backport 4f58af0a8dd5eced77259bed180f6af36501f502

Changes: https://git.openjdk.org/jdk21u-dev/pull/1713/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1713&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8259540
  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1713.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1713/head:pull/1713

PR: https://git.openjdk.org/jdk21u-dev/pull/1713