Minor issue: Incorrect link under "Support" in Readme

[Hansaplast]

Just a minor issue (noticed it when opening printwatch-card in HACS);

Support
If you're having issues, please:

Check the Troubleshooting section above
Search existing GitHub issues <-- incorrect link
Create a new issue if your problem isn't already reported

The link to "Github issues" is incorrect. 😊
Points to https://github.com/**yourusername**/printwatch-card/issues ...

(thank you for all your work on this one, will test it with a H2C this weekend)