RFR: JDK-8300321: Use link tags in javax.sql.rowset package-info

[Joe Darcy]

In the course of some other work (JDK-8300133), I noticed some cases where the javadoc in the package-info file for javax.sql.rowset used HTML links where a more readable javadoc link tag would suffice.

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Commit messages:
 - JDK-8300321: Use link tags in javax.sql.rowset package-info

Changes: https://git.openjdk.org/jdk/pull/12051/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=12051&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8300321
  Stats: 8 lines in 1 file changed: 0 ins; 0 del; 8 mod
  Patch: https://git.openjdk.org/jdk/pull/12051.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/12051/head:pull/12051

PR: https://git.openjdk.org/jdk/pull/12051