sway: manually update version in meson.build
sway: manually update version in meson.build

This wasn't done upstream. Adapted from:

https://github.com/primeos/nixpkgs-primeos/blob/5956e993dd320183f943e72fd6ec200232900249/default.nix#L32-L34

Co-Authored-By: Michael Weiss <156fd43a075f8d2c013bde5d3bac58cb37bc5cdc@gmail.com>

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