Freeze Break Request: koji 1.20.1

[Kevin Fenzi]

Greetings. 

There's several smallish issues in our koji: 

* texlive doesn't build ( https://pagure.io/koji/issue/1119 )
* you can't use the interface to look at newRepo and other tasks made by
a sidetag thats since been deleted ( https://pagure.io/koji/issue/1866 )

I'd like to propose upgrading to the 1.20.1 bugfix release that has
fixes for both these things. 

There's no schema changes so we can easily roll back to 1.20.0 if
needed. 

https://pagure.io/koji/roadmap/1.20.1/ has the full list of bugfixes in
the release. 

kevin