fix: don't overwrite SSH configuration if Chezmoi provides one

ansible/provision.yml

@@ -597,7 +597,12 @@
             dest: /home/vagrant/.local/bin/{{ item.path | basename }}
 
         # Configure SSH for the vagrant user
+        - name: Check for a Chezmoi-provided SSH configuration
+          ansible.builtin.stat:
+            path: /home/vagrant/.ssh/config
+          register: chezmoi_ssh_config
         - name: Configure SSH for the vagrant user
+          when: not chezmoi_ssh_config.stat.exist
           ansible.builtin.copy:
             src: files/ssh_config
             dest: /home/vagrant/.ssh/config