RFR: Added anchor for noreg table

[Jesper Wilhelmsson]

On request, adding an anchor to allow for links to the noreg-table. The link will be
https://openjdk.java.net/guide/changePlanning.html#noreg

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Commit messages:
 - Fixed an unrelated typo on the same page
 - Added anchor for noreg table

Changes: https://git.openjdk.java.net/guide/pull/16/files
 Webrev: https://webrevs.openjdk.java.net/guide/16/webrev.00
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/guide/pull/16.diff
  Fetch: git fetch https://git.openjdk.java.net/guide pull/16/head:pull/16

PR: https://git.openjdk.java.net/guide/pull/16