RFR: Misc minor updates [v2]

[Jesper Wilhelmsson]

> * Updated code owners
> * Removed text duplication around the -na labels
> * Fixed typos
> * Changed the order of fields in the Release Note creation to match the order in JBS and added a note about Component/Subcomponent

Jesper Wilhelmsson has updated the pull request incrementally with one additional commit since the last revision:

  Updated code owners

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

Changes:
  - all: https://git.openjdk.org/guide/pull/132/files
  - new: https://git.openjdk.org/guide/pull/132/files/2a8822bb..e597b033

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=guide&pr=132&range=01
 - incr: https://webrevs.openjdk.org/?repo=guide&pr=132&range=00-01

  Stats: 3 lines in 1 file changed: 1 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/guide/pull/132.diff
  Fetch: git fetch https://git.openjdk.org/guide.git pull/132/head:pull/132

PR: https://git.openjdk.org/guide/pull/132