editors/emacs: Update to 30.2

[yasu]

Summary

Bump PORTREVISION of dependent ports.

ChangLog: https://cgit.git.savannah.gnu.org/cgit/emacs.git/tree/etc/NEWS?h=emacs-30.2

Test Plan

Build of all flavors succeeds with poudriere and 14.3-RELEASE amd64 jail.

[yasu]

• Chase update of databases/pg.el
• Update commit message

[jrm]

Thanks for doing this.

I started testing locally in a jail built from main, but hit a simple merge conflict in databases/pg.el. It's easy to fix locally, but just a heads up.
You also need to update Mk/Uses/eamcs.mk to change EMACS_VER=30.1 to EMACS_VER=30.2.

I will report back when the tests are complete.

[jrm]

Everything looks good after that one change to Mk/Uses/emacs.mk.