RFR: Clarifications on becoming an Author

[Jesper Wilhelmsson]

Did a test run of the text with a new contributor who was trying to become Author. Some clarifications needed.

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Commit messages:
 - Clarifications on becoming an Author

Changes: https://git.openjdk.org/guide/pull/102/files
 Webrev: https://webrevs.openjdk.org/?repo=guide&pr=102&range=00
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/guide/pull/102.diff
  Fetch: git fetch https://git.openjdk.org/guide.git pull/102/head:pull/102

PR: https://git.openjdk.org/guide/pull/102