RFR: 8338817: Wrong indent in API docs for java.lang.management.ManagementFactory

[Kevin Walls]

Trivial change.
Javadoc has a misplaced and unnecessary blockquote tag which cuts across two sections.  Removing this fixes the odd indent.

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Commit messages:
 - 8338817: Wrong indent in API docs for java.lang.management.ManagementFactory

Changes: https://git.openjdk.org/jdk/pull/20813/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=20813&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8338817
  Stats: 3 lines in 1 file changed: 0 ins; 2 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/20813.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20813/head:pull/20813

PR: https://git.openjdk.org/jdk/pull/20813