Refactor variable names in git.yml for consistency and clarity

roles/common/tasks/git.yml

@@ -292,7 +292,7 @@
 #  Group [so36_server_dehydrated] reposotories
 # ---
 
-#- name: (git.yml) Install/Update sympa server repositories
+# - name: (git.yml) Install/Update sympa server repositories
 #   git:
 #     repo: '{{ item.repo }}'
 #     dest: '{{ item.dest }}'
@@ -311,14 +311,14 @@
 - name: (git.yml) Check for host specific git vars file
   ansible.builtin.stat:
     path: "vars/git-{{ inventory_hostname }}.yml"
-  register: git_host_vars_file
+  register: common_git_host_vars_file
   tags:
     - git-other-repositories
 
 - name: (git.yml) Include only files matching git-<hostname>.yml (2.2)
   ansible.builtin.include_vars:
     file: "vars/git-{{ inventory_hostname }}.yml"
-  when: git_host_vars_file.stat.exists
+  when: common_git_host_vars_file.stat.exists
   tags:
     - git-other-repositories