Correct nmcli dns example and documentation. Fix example indent (#20203)

Fixes https://github.com/ansible/ansible-modules-extras/issues/1910
and https://github.com/ansible/ansible-modules-extras/issues/1843

lib/ansible/modules/net_tools/nmcli.py

@@ -62,7 +62,7 @@ options:
         required: False
         choices: [ ethernet, team, team-slave, bond, bond-slave, bridge, vlan ]
         description:
-            - This is the type of device or network connection that you wish to create.
+            - This is the type of device or network connection that you wish to create or modify.
     mode:
         required: False
         choices: [ "balance-rr", "active-backup", "balance-xor", "broadcast", "802.3ad", "balance-tlb", "balance-alb" ]
@@ -87,7 +87,7 @@ options:
         required: False
         default: None
         description:
-            - 'A list of upto 3 dns servers, ipv4 format e.g. To add two IPv4 DNS server addresses: ["192.0.2.53", "198.51.100.53"]'
+            - 'A list of upto 3 dns servers, ipv4 format e.g. To add two IPv4 DNS server addresses: "192.0.2.53 198.51.100.53"'
     ip6:
         required: False
         default: None
@@ -101,7 +101,7 @@ options:
     dns6:
         required: False
         description:
-            - 'A list of upto 3 dns servers, ipv6 format e.g. To add two IPv6 DNS server addresses: ["2001:4860:4860::8888 2001:4860:4860::8844"]'
+            - 'A list of upto 3 dns servers, ipv6 format e.g. To add two IPv6 DNS server addresses: "2001:4860:4860::8888 2001:4860:4860::8844"'
     mtu:
         required: False
         default: 1500
@@ -456,6 +456,7 @@ EXAMPLES='''
 # To add two IPv4 DNS server addresses:
   - nmcli:
     conn_name: my-eth1
+    type: ethernet
     dns4:
       - 192.0.2.53
       - 198.51.100.53