Newly added donation notification links to a closed campaign

[Avasam]

Expected behaviour

A link to a working donation platform, or no link at all

Actual behaviour

#940 Added a link to https://www.indiegogo.com/projects/opencv-5-support-non-profit-open-source-cv-ai#/, but the campaign is closed

Steps to reproduce

Click the link

Issue submission checklist

• This is not a generic OpenCV usage question (looking for help for coding, other usage questions, homework etc.)
• I have read the README of this repository and understand that this repository provides only an automated build toolchain for OpenCV Python packages (there is no actual OpenCV code here)
• The issue is related to the build scripts in this repository, to the pre-built binaries or is a feature request (such as "please enable this additional dependency") (it's related to this repo's own readme, so close enough?)
• I'm using the latest version of opencv-python

[asmorkalov]

#983