doc: Correct mixed up commentary and task name (#78610)

Co-authored-by: Sloane Hertel <19572925+s-hertel@users.noreply.github.com>

lib/ansible/modules/replace.py

@@ -110,7 +110,7 @@ notes:
 '''
 
 EXAMPLES = r'''
-- name: Before Ansible 2.3, option 'dest', 'destfile' or 'name' was used instead of 'path'
+- name: Replace old hostname with new hostname (requires Ansible >= 2.4)
   ansible.builtin.replace:
     path: /etc/hosts
     regexp: '(\s+)old\.host\.name(\s+.*)?$'