[docs] Correct misspelled domain in icinga2_host.py (#38867)

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Just a misspelled link. Updated.
+label: docsite_pr

lib/ansible/modules/monitoring/icinga2_host.py

@@ -101,7 +101,7 @@ options:
 EXAMPLES = '''
 - name: Add host to icinga
   icinga_host:
-    url: "https://icinga2.example.co,m"
+    url: "https://icinga2.example.com"
     url_username: "ansible"
     url_password: "a_secret"
     state: present