[FEATURE] Update Bootstrap Package to v14 (#111)

This patch increases the branch-alias only, update of BP was done with
110a494
but was not correctly tagged as feature and we need this to increase the
version during the release.

composer.json

@@ -65,7 +65,7 @@
 	},
 	"extra": {
 		"branch-alias": {
-			"dev-main": "4.6.x-dev"
+			"dev-main": "4.7.x-dev"
 		},
 		"typo3/cms": {
 			"extension-key": "introduction",