fix return type of post /ssh/creds

added sample json for both otp and dynamic credentials

website/source/docs/secrets/ssh/index.html.md

@@ -557,10 +557,54 @@ username@ip:~$
   </dd>
 
   <dt>Returns</dt>
-  <dd>
-    A `204` response code.
+  <dd>For a dynamic key role:
+
+```json
+{
+  "lease_id": "",
+  "renewable": false,
+  "lease_duration": 0,
+  "data": {
+            "admin_user": "rajanadar",
+            "allowed_users": "",
+            "cidr_list": "x.x.x.x/y",
+            "default_user": "rajanadar",
+            "exclude_cidr_list": "x.x.x.x/y",
+            "install_script": "pretty_large_script",
+            "key": "5d9ee6a1-c787-47a9-9738-da243f4f69bf",
+            "key_bits": 1024,
+            "key_option_specs": "",
+            "key_type": "dynamic",
+            "port": 22
+           },
+  "warnings": null,
+  "auth": null
+}
+```
+
   </dd>
 
+  <dd>For an OTP role:
+
+```json
+{
+  "lease_id": "sshs/creds/c3c2e60c-5a48-415a-9d5a-a41e0e6cdec5/3ee6ad28-383f-d482-2427-70498eba4d96",
+  "renewable": false,
+  "lease_duration": 2592000,
+  "data": {
+            "ip": "127.0.0.1",
+            "key": "6d6411fd-f622-ea0a-7e2c-989a745cbbb2",
+            "key_type": "otp",
+            "port": 22,
+            "username": "rajanadar"
+           },
+  "warnings": null,
+  "auth": null
+}
+```
+  </dd>
+
+
 ### /ssh/lookup
 #### POST