Use tagged SCSS depdendency

Author: malberts

composer.json

@@ -37,7 +37,7 @@
 	"require": {
 		"php": ">=8.1",
 		"composer/installers": "^2|^1.0.1",
-		"mediawiki/scss": "5.x-dev"
+		"mediawiki/scss": "~5.0"
 	},
 	"require-dev": {
 		"mediawiki/mediawiki-codesniffer": "46.0.0",