RFR: 8305807: Spurious right brace in ConstantDescs field Javadocs

[Chen Liang]

Please review a small patch, fixing extraneous right braces in field javadocs of BSM_EXPLICIT_CAST, BSM_CLASS_DATA, and BSM_CLASS_DATA_AT.

JDK 20: https://docs.oracle.com/en/java/javase/20/docs/api/java.base/java/lang/constant/ConstantDescs.html#BSM_EXPLICIT_CAST
JDK 21: https://download.java.net/java/early_access/jdk21/docs/api/java.base/java/lang/constant/ConstantDescs.html#field-summary
With this patch: https://cr.openjdk.org/~liach/8305807/java.base/java/lang/constant/ConstantDescs.html#field-summary

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Commit messages:
 - 8305807: Spurious right brace in ConstantDescs field Javadocs

Changes: https://git.openjdk.org/jdk/pull/13410/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13410&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8305807
  Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/13410.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13410/head:pull/13410

PR: https://git.openjdk.org/jdk/pull/13410