Hello m.umer1909,
the cisco 350 switch does not run IOS but a different firmware.
You can refer to the following links
command reference for Cisco 350 firmware version 2.2.5
https://www.cisco.com/c/dam/en/us/td/docs/switches/lan/csbms/350_/cli_guide/CLI_Tesla_Sx350_2_2_5.pdf
And quick start guide in different languagues
https://www.cisco.com/c/en/us/support/switches/350-series-managed-switches/tsd-products-support-translated-end-user-guides-list.html?dtid=osscdc000283
On the first document after you download it you can search for "trunk" occurrences
You can find the following commands to be given in interface configuration mode see pag 1268 in the pdf in the CLI (shell)
interface gi12
switchport mode trunk
switchport trunk native vlan 5
switchport trunk allowed vlan 5,6
This configuration should allow you to connect the Aruba AP to the Cisco 350 switch on port 12.
Hope to help
Giuseppe