RFR: Section on release notes

Fri Feb 18 02:00:32 UTC 2022

The meat of the procedure here was inspired by Daniel Fuchs' comment in JDK-8273727.
[[JDK-8273727] (prop) Canonical property storage - Java Bug System](https://bugs.openjdk.java.net/browse/JDK-8273727?focusedCommentId=14448738&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14448738)

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Commit messages:
 - Section on release notes

Changes: https://git.openjdk.java.net/guide/pull/75/files
 Webrev: https://webrevs.openjdk.java.net/?repo=guide&pr=75&range=00
  Stats: 93 lines in 1 file changed: 64 ins; 26 del; 3 mod
  Patch: https://git.openjdk.java.net/guide/pull/75.diff
  Fetch: git fetch https://git.openjdk.java.net/guide pull/75/head:pull/75

PR: https://git.openjdk.java.net/guide/pull/75