Update package.json

Added sponsor

Author: ecmel

package.json

@@ -8,6 +8,9 @@
 	"homepage": "https://github.com/ecmel/vscode-html-css",
 	"bugs": "https://github.com/ecmel/vscode-html-css/issues",
 	"icon": "icon.png",
+	"sponsor": {
+		"url": "https://www.buymeacoffee.com/ecmel"
+	}
 	"repository": {
 		"type": "git",
 		"url": "https://github.com/ecmel/vscode-html-css.git"
@@ -100,4 +103,4 @@
 		"webpack": "^5.70.0",
 		"webpack-cli": "^4.9.2"
 	}
-}
+}