Powershell script to replace a section of url in a particular field of an item in sharepoint List

Hi,

I have a sharepoint list with column named URL and the field type is hyperlink and it has the value as http://abc.com/xyz=123 and i need to replace this column value as http://test.com/abc=123 . I have to modify around 1000 list items. How do i replace the url in the Sharepoint list using powershell.

Any help is much appreciated. Thank u

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