RFR: 7921: Create 8.3 release notes [v3]

[Marcus Hirt]

> The fixed issue count my get higher in the end, but I think that's ok.

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

  Removing superflous image

-------------

Changes:
  - all: https://git.openjdk.org/jmc/pull/437/files
  - new: https://git.openjdk.org/jmc/pull/437/files/7745a292..35646349

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jmc&pr=437&range=02
 - incr: https://webrevs.openjdk.org/?repo=jmc&pr=437&range=01-02

  Stats: 0 lines in 1 file changed: 0 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jmc/pull/437.diff
  Fetch: git fetch https://git.openjdk.org/jmc pull/437/head:pull/437

PR: https://git.openjdk.org/jmc/pull/437