fix example config

Author: topi314

application.yml

@@ -19,8 +19,9 @@ spring:
           deleteUntrackedBranches: false
           refreshRate: 0
           # username: trolley
+          # for GitHub, use a personal access token
           # password: strongpassword
-          defaultLabel: master
+          defaultLabel: main
         # See: https://docs.spring.io/spring-cloud-config/docs/current/reference/html/#_file_system_backend
         native:
           searchLocations: "file:config/{application"