RFR: Section about the release process [v3]

[Jesper Wilhelmsson]

> Answering some common questions around the release process.

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

  Updates after review

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

Changes:
  - all: https://git.openjdk.java.net/guide/pull/62/files
  - new: https://git.openjdk.java.net/guide/pull/62/files/4db373f0..32bf9285

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=guide&pr=62&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=guide&pr=62&range=01-02

  Stats: 27 lines in 1 file changed: 2 ins; 13 del; 12 mod
  Patch: https://git.openjdk.java.net/guide/pull/62.diff
  Fetch: git fetch https://git.openjdk.java.net/guide pull/62/head:pull/62

PR: https://git.openjdk.java.net/guide/pull/62