gdbus_codegen: Fix install_dir parameter
gdbus_codegen: Fix install_dir parameter

The `install` parameter that is present in the `permittedKwargs`
annotation is wrong. The correct parameter name, which is also
consistent with the rest of functions in the `gnome` module, is
`install_dir`.

thiblahute/meson,pexip/meson,mesonbuild/meson,jpakkane/meson,QuLogic/meson,pexip/meson,mesonbuild/meson,MathieuDuponchelle/meson,jeandet/meson,jpakkane/meson,thiblahute/meson,jpakkane/meson,MathieuDuponchelle/meson,QuLogic/meson,pexip/meson,mesonbuild/meson,pexip/meson,QuLogic/meson,MathieuDuponchelle/meson,thiblahute/meson,jeandet/meson,jpakkane/meson,QuLogic/meson,becm/meson,thiblahute/meson,jeandet/meson,jpakkane/meson,becm/meson,jeandet/meson,becm/meson,mesonbuild/meson,thiblahute/meson,becm/meson,MathieuDuponchelle/meson,becm/meson,becm/meson,pexip/meson,mesonbuild/meson,pexip/meson,jpakkane/meson,pexip/meson,thiblahute/meson,mesonbuild/meson,MathieuDuponchelle/meson,becm/meson,jeandet/meson,thiblahute/meson,pexip/meson,MathieuDuponchelle/meson,pexip/meson,mesonbuild/meson,mesonbuild/meson,MathieuDuponchelle/meson,QuLogic/meson,jeandet/meson,jpakkane/meson,jpakkane/meson,jeandet/meson,MathieuDuponchelle/meson,QuLogic/meson,QuLogic/meson,becm/meson,jeandet/meson,QuLogic/meson,mesonbuild/meson,jeandet/meson,pexip/meson,jpakkane/meson,MathieuDuponchelle/meson,QuLogic/meson,thiblahute/meson,becm/meson,mesonbuild/meson,thiblahute/meson,becm/meson