jmri: add jmri_lcrr_branch var; main-street-station tracks clean-profile

ansible/roles/jmri/tasks/main.yml

@@ -133,7 +133,7 @@
   ansible.builtin.git:
     repo: "{{ jmri_lcrr_repo }}"
     dest: "{{ jmri_home }}/LCRR"
-    version: main
+    version: "{{ jmri_lcrr_branch }}"
     accept_hostkey: true
     key_file: "{{ jmri_gitea_key }}"
     update: false