Bug#1013383: ruby-github-markup: FTBFS with ruby3.0: ERROR: Test "ruby3.0" failed.

[Abhijith PA]

Hello. 

I've pushed the changes 
https://salsa.debian.org/ruby-team/ruby-github-markup/-/commit/60644d46f911aadbe7787a20d17c89ffa32d7aa3

#996234 #1013383 will be fixed on next upload.


--abhijith