RFR: 8330686: Fix typos in the DatabaseMetaData javadoc

[Jin Kwon]

Fix typos within the `DatabaseMetaData.java`.

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Commit messages:
 - Merge branch 'master' of github.com:onacit/jdk
 - Merge branch 'master' of github.com:onacit/jdk
 - Fix more typos
 - Fix typo
 - Fix wrongly typed constant name
 - Fix more typos
 - Fix typo
 - Fix wrongly typed constant name
 - Fix more typos
 - Fix typo

Changes: https://git.openjdk.org/jdk/pull/18860/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=18860&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8330686
  Stats: 4 lines in 1 file changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/18860.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18860/head:pull/18860

PR: https://git.openjdk.org/jdk/pull/18860