Closes #3241: Correct terminology in inventory items table header

netbox/templates/dcim/device_inventory.html

@@ -37,7 +37,7 @@
                             <th>Name</th>
                             <th></th>
                             <th>Manufacturer</th>
-                            <th>Part Number</th>
+                            <th>Part ID</th>
                             <th>Serial Number</th>
                             <th>Asset Tag</th>
                             <th>Description</th>