RFR: Update ccc discussion to CSR

[Joe Darcy]

Update ccc discussion to CSR

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Commit messages:
 - Update changePlanning.md
 - Update changePlanning.md
 - Update reviewBodies.md

Changes: https://git.openjdk.java.net/guide/pull/19/files
 Webrev: https://webrevs.openjdk.java.net/guide/19/webrev.00
  Stats: 7 lines in 2 files changed: 0 ins; 1 del; 6 mod
  Patch: https://git.openjdk.java.net/guide/pull/19.diff
  Fetch: git fetch https://git.openjdk.java.net/guide pull/19/head:pull/19

PR: https://git.openjdk.java.net/guide/pull/19