Fix issue template user_kudos.md

[chrwm]

Description of the issue

The workflow to populate USERS.cff doesn't like the double quotes in user_kudos.md
Without them special characters and spaces are processes as expected.

Ideas of solution

Remove double quotes in user_kudos.md

Context and Environment

• Version used:
• Operating system:
• Environment setup and (python) version:

Workflow checklist

• I am aware of the workflow in CONTRIBUTING.md

[FlorianK13]

Also the "Many thanks FlorianK13!" should be a "Many thanks @FlorianK13"

[FlorianK13]

@chrwm were the problems we saw in the last merge on production fixed by you? So can we merge the new PRs to develop?

[chrwm]

Yes the fix is ready for review in #545

[FlorianK13]

Ok, I reviewed. You can merge if it is ready.