It's not troublesome to update the page title in MediaWiki.
Please follow the below steps to update the page title:
Step 1: Log in to the MediaWiki Admin section.
Step 2: Tap on the More option located at the top of the page.
Step 3: Choose 'Move' from the dropdown.
Step 4: Now you will be navigated to the new page, here you can update the title by entering in 'New title' tab.
Step 5: MediaWiki empowers the clients to pick in the event that they need to make a divert from the old URL to the upgraded one and if clients need to watch both the pages, you can choose your choice appropriately
Step 6: Now tap on the 'Move page' button.