Update file PKGBUILD

PKGBUILD

@@ -67,7 +67,7 @@ build() {
 }
 
 # Tests assume access to vulkan video drivers, Wayland window creation,
-# detecting system keymaps, etc. Until their is something sensical for
+# detecting system keymaps, etc. Until there is something sensical for
 # a package to test in the suite, just skip it by default.
 check() {
 	_srcenv