Docs for listing devices in a device group seems misplaced in port-docs. (#9250)

DO NOT DELETE THIS TEXT

#### Please note

> Please read this information carefully. You can run `./scripts/pre-commit.php` to check your code before submitting.

- [x] Have you followed our [code guidelines?](http://docs.librenms.org/Developing/Code-Guidelines/)

#### Testers

If you would like to test this pull request then please run: `./scripts/github-apply <pr_id>`, i.e `./scripts/github-apply 5926`
After you are done testing, you can remove the changes with `./scripts/github-remove`.  If there are schema changes, you can ask on discord how to revert.

doc/API/DeviceGroups.md

@@ -33,3 +33,42 @@ Output:
     }
 ]
 ```
+
+### `get_devices_by_group`
+
+List all devices matching the group provided.
+
+Route: `/api/v0/devicegroups/:name`
+
+  - name Is the name of the device group which can be obtained using [`get_devicegroups`](#function-get_devicegroups). Please ensure that the name is urlencoded if it needs to be (i.e Linux Servers would need to be urlencoded.
+
+Input (JSON):
+
+  - full: set to any value to return all data for the devices in a given group
+
+Examples:
+```curl
+curl -H 'X-Auth-Token: YOURAPITOKENHERE' https://librenms.org/api/v0/devicegroups/LinuxServers
+```
+
+Output:
+```json
+[
+     {
+         "status": "ok",
+         "message": "Found 3 in group LinuxServers",
+         "count": 3,
+         "devices": [
+            {
+                "device_id": "15"
+            },
+            {
+                "device_id": "18"
+            },
+            {
+                "device_id": "20"
+            }
+         ]
+     }
+]
+```

doc/API/Ports.md

@@ -180,42 +180,3 @@ Output:
   ]
 }
 ```
-
-### `get_devices_by_group`
-
-List all devices matching the group provided.
-
-Route: `/api/v0/devicegroups/:name`
-
-  - name Is the name of the device group which can be obtained using [`get_devicegroups`](#function-get_devicegroups). Please ensure that the name is urlencoded if it needs to be (i.e Linux Servers would need to be urlencoded.
-
-Input (JSON):
-
-  - full: set to any value to return all data for the devices in a given group
-
-Examples:
-```curl
-curl -H 'X-Auth-Token: YOURAPITOKENHERE' https://librenms.org/api/v0/devicegroups/LinuxServers
-```
-
-Output:
-```json
-[
-     {
-         "status": "ok",
-         "message": "Found 3 in group LinuxServers",
-         "count": 3,
-         "devices": [
-            {
-                "device_id": "15"
-            },
-            {
-                "device_id": "18"
-            },
-            {
-                "device_id": "20"
-            }
-         ]
-     }
-]
-```