%20 need to replace with -

Dear All,
My website is being hit by some urls that is not
served
properly by nginx due to some characters like %20.

ABC Home Page - ABC.com (Works fine)

ABC Home Page - ABC.com (Do no work)
it should be something like this ABC Home Page - ABC.com

I want to replace %20 with - (Dash). Please suggest me best regex for
the
same.

Thanks,
Om

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