The contributor list of tagged releases is wrong when the display name and username do not match.

Let's take https://github.com/py-pdf/pypdf/releases/tag/3.16.3 for example:

• I am attributed to https://github.com/Stefan
• DOC: Link to CONTRIBUTING.md in README.md #2232 is attributed to https://github.com/markpfeifle

I think this is undesired as it attributes the wrong persons and might even notify the wrong users for stuff they did never touch.

When using the GitHub website, an automated/corrected changelog would probably be generated (there is a button for auto-generating it).