refactor: Adjust release please config so that it produces alpha release

Author: d3xter666

release-please-config.json

@@ -1,6 +1,9 @@
 {
 	"$schema": "https://raw.githubusercontent.com/googleapis/release-please/main/schemas/config.json",
 	"group-pull-request-title-pattern": "release: UI5 CLI packages",
+	"prerelease-type": "alpha",
+	"prerelease": true,
+	"release-as": "5.0.0-alpha.0",
 	"packages": {
 		"packages/logger": {
 			"component": "logger"