RFR: 8345279: Mistake in javadoc of javax.sql.rowset.BaseRowSet#setBigDecimal

[Jaikiran Pai]

Can I please get a review of this trivial typo fix in the javadoc of `javax.sql.rowset.BaseRowSet#setBigDecimal()` method?

As noted in https://bugs.openjdk.org/browse/JDK-8345279, the javadoc incorrectly mentions `java.lang.BigDecimal` instead of `java.math.BigDecimal`. As part of this change, I had considered using a `{@link}` or a `{@linkplain}` to the `BigDecimal` class in this method's javadoc, but decided not to do so, to keep it consistent with several others methods in this class.

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Commit messages:
 - 8345279: Mistake in javadoc of javax.sql.rowset.BaseRowSet#setBigDecimal

Changes: https://git.openjdk.org/jdk/pull/22470/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=22470&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8345279
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/22470.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/22470/head:pull/22470

PR: https://git.openjdk.org/jdk/pull/22470