Update v3.mdx (#1003)

Resolves ngrok-private/ngrok#33865

Update example and url for endpoints to include TCP and TLS.

docs/agent/config/v3.mdx

@@ -316,7 +316,7 @@ endpoint configuration options can be found here.
 
 ### Example
 
-In the snippet below we are defining two endpoints named 'httpbin' and 'demo':
+In the snippet below we are defining two HTTPS endpoints, one TCP endpoint, and one TLS endpoint named 'httpbin', 'demo', 'ssh', and 'demo-2':
 
 ```yaml
 endpoints:
@@ -328,6 +328,14 @@ endpoints:
     url: https://demo.inconshreveable.com
     upstream:
       url: 8181
+  - name: ssh
+    url: tcp://1.tcp.ngrok.io:12345
+    upstream:
+      url: 22
+  - name: demo-2
+    url: tls://myexample.ngrok.app
+    upstream:
+      url: 443
 ```
 
 #### Start the endpoint named 'httpbin'
@@ -379,9 +387,9 @@ String. The address you would like to use to forward traffic to your upstream se
 
 - **Domain** - `example.org`
   - When using the _domain_ format you are only defining the domain. The scheme and port will be inferred.
-- **Origin** - `https://example.ngrok.app` _or_ `https://example.ngrok.app:443`
-  - When using the _origin_ format you are defining the protocol, domain and port.
-- **Scheme (shorthand)** - `https://`
+- **Origin** - `https://example.ngrok.app` _or_ `https://example.ngrok.app:443` _or_ `tcp://1.tcp.ngrok.io:12345` _or_ `tls://example.ngrok.app`
+  - When using the _origin_ format you are defining the protocol, domain and port. HTTP endpoints accept ports `80` or `443` with respective protocol.
+- **Scheme (shorthand)** - `https://` _or_ `tcp://` _or_ `tls://` _or_ `http://`
   - When using _scheme_ you are defining the protocol and will receive back a randomly assigned ngrok address.
 - **Empty** - ``
   - When _empty_ your endpoint will default to be `https` and receive back a randomly assigned ngrok address.