syntax-highlighting: vim: fix setting cpo [skip ci]
syntax-highlighting: vim: fix setting cpo [skip ci]

since 'cpo' is global, use `set` instead of `setlocal`.

Reported-By: Bram Moolenaar <a718c80c7d32c985cbf0929922b5d2c19ec99565@vim.org>
Signed-off-by: Liam Beguin <ac8b122174024ef5e58ca7d6d989651e9bbfc948@gmail.com>
mesonbuild/meson,jpakkane/meson,mesonbuild/meson,mesonbuild/meson,mesonbuild/meson,jpakkane/meson,mesonbuild/meson,becm/meson,jpakkane/meson,QuLogic/meson,pexip/meson,pexip/meson,becm/meson,QuLogic/meson,QuLogic/meson,becm/meson,QuLogic/meson,jpakkane/meson,pexip/meson,mesonbuild/meson,pexip/meson,becm/meson,becm/meson,mesonbuild/meson,jpakkane/meson,pexip/meson,becm/meson,QuLogic/meson,becm/meson,pexip/meson,QuLogic/meson,mesonbuild/meson,jpakkane/meson,jpakkane/meson,jpakkane/meson,becm/meson,mesonbuild/meson,jpakkane/meson,pexip/meson,becm/meson,mesonbuild/meson,QuLogic/meson,QuLogic/meson,pexip/meson,pexip/meson,QuLogic/meson,pexip/meson,becm/meson