[project][INTERNAL] Bump @ui5/builder from 3.0.0-alpha.5 to 3.0.0-alpha.6

Changelog of this version: https://github.com/SAP/ui5-builder/blob/v3.0.0-alpha.6/CHANGELOG.md

Author: flovogt

packages/project/package-lock.json

@@ -102,7 +102,7 @@
 		"url": "git@github.com:SAP/ui5-project.git"
 	},
 	"dependencies": {
-		"@ui5/builder": "^3.0.0-alpha.5",
+		"@ui5/builder": "^3.0.0-alpha.6",
 		"@ui5/logger": "^3.0.1-alpha.1",
 		"@ui5/server": "^3.0.0-alpha.1",
 		"ajv": "^6.12.6",