[jfx17u] RFR: 8283869: Update attribution in webkit.md file

[Kevin Rushforth]

Clean backport to `jfx17u`.

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

Commit messages:
 - 8283869: Update attribution in webkit.md file

Changes: https://git.openjdk.java.net/jfx17u/pull/62/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jfx17u&pr=62&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8283869
  Stats: 5484 lines in 1 file changed: 5483 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jfx17u/pull/62.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx17u pull/62/head:pull/62

PR: https://git.openjdk.java.net/jfx17u/pull/62