[foreign-jextract] RFR: Refresh panama documents to reflect API changes [v2]

[Maurizio Cimadamore]

> This change updates the memory access/linker markdown documents, to reflect the latest API changes described in [1].
> 
> [1] - https://inside.java/2021/09/16/finalizing-the-foreign-apis/

Maurizio Cimadamore has updated the pull request incrementally with one additional commit since the last revision:

  Address review comments

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Changes:
  - all: https://git.openjdk.java.net/panama-foreign/pull/578/files
  - new: https://git.openjdk.java.net/panama-foreign/pull/578/files/3f42f5d6..af00c6a6

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=panama-foreign&pr=578&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=panama-foreign&pr=578&range=00-01

  Stats: 7 lines in 1 file changed: 2 ins; 0 del; 5 mod
  Patch: https://git.openjdk.java.net/panama-foreign/pull/578.diff
  Fetch: git fetch https://git.openjdk.java.net/panama-foreign pull/578/head:pull/578

PR: https://git.openjdk.java.net/panama-foreign/pull/578