RFR: 8202: JMC 9 release notes [v3]

[Marcus Hirt]

> First draft! Please let me know what I missed. :)

Marcus Hirt has updated the pull request incrementally with one additional commit since the last revision:

  Adding dark mode, file channel force and a nicer image for linux aarch64

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Changes:
  - all: https://git.openjdk.org/jmc/pull/555/files
  - new: https://git.openjdk.org/jmc/pull/555/files/64ab04ca..fe3d25ff

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jmc&pr=555&range=02
 - incr: https://webrevs.openjdk.org/?repo=jmc&pr=555&range=01-02

  Stats: 17 lines in 5 files changed: 16 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jmc/pull/555.diff
  Fetch: git fetch https://git.openjdk.org/jmc.git pull/555/head:pull/555

PR: https://git.openjdk.org/jmc/pull/555