Use latest SCSS library

Author: malberts

composer.json

@@ -37,7 +37,7 @@
 	"require": {
 		"php": ">=8.1",
 		"composer/installers": "^2|^1.0.1",
-		"mediawiki/scss": "~4.0"
+		"mediawiki/scss": "5.x-dev"
 	},
 	"require-dev": {
 		"mediawiki/mediawiki-codesniffer": "46.0.0",

docs/release-notes.md

@@ -7,6 +7,7 @@ Under development.
 * Raised minimum MediaWiki version from 1.39 to 1.43
 * Raised minimum PHP version from 8.0 to 8.1
 * Replaced Bootstrap 4.6.2 with Bootstrap 5.3.8
+* Raised minimum SCSS library dependency to 5.x
 
 ### MediaWiki Bootstrap 5.0.0