Fix broken link in Readme.md of toy mstis examples

[sroet]

When looking through the repository, I noticed that the link 404ed

[codecov]

Codecov Report

Merging #963 (000d526) into master (5f9c545) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #963   +/-   ##
=======================================
  Coverage   80.25%   80.25%           
=======================================
  Files         136      136           
  Lines       14449    14449           
=======================================
  Hits        11596    11596           
  Misses       2853     2853           

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[dwhswenson]

Weird that I managed to not fill in that URL! Thanks for the fix. Currently re-running tests (the coverage drop should have been fixed by #964); will merge after tests run.

[sroet]

Currently re-running tests (the coverage drop should have been fixed by #964); will merge after tests run.

I don't think that actually runs on current master (as it is still my (un-updated) branch), will merge master to trigger another run

[dwhswenson]

I don't think that actually runs on current master (as it is still my (un-updated) branch), will merge master to trigger another run

CI tests on a merge commit. I'm not sure if the previous merge commit is cached for GitHub Actions. But even if so, good chance you wouldn't get the same coverage drop ;-)