doc: move jdalton to emeritus

In email, John-David Dalton confirmed that it was appropriate to move to
emeritus at this time.

README.md

@@ -347,8 +347,6 @@ For information about the governance of the Node.js project, see
 **Jackson Tian** <shyvo1987@gmail.com>
 * [jasnell](/~https://github.com/jasnell) -
 **James M Snell** <jasnell@gmail.com> (he/him)
-* [jdalton](/~https://github.com/jdalton) -
-**John-David Dalton** <john.david.dalton@gmail.com>
 * [jkrems](/~https://github.com/jkrems) -
 **Jan Krems** <jan.krems@gmail.com> (he/him)
 * [joaocgreis](/~https://github.com/joaocgreis) -
@@ -516,6 +514,8 @@ For information about the governance of the Node.js project, see
 **Jason Ginchereau** <jasongin@microsoft.com>
 * [jbergstroem](/~https://github.com/jbergstroem) -
 **Johan Bergström** <bugs@bergstroem.nu>
+* [jdalton](/~https://github.com/jdalton) -
+**John-David Dalton** <john.david.dalton@gmail.com>
 * [jhamhader](/~https://github.com/jhamhader) -
 **Yuval Brik** <yuval@brik.org.il>
 * [joshgav](/~https://github.com/joshgav) -