fix: Mismatch of PWD in tutorial

[kenoss]

What is fixed

At this line, readers are in <repository-root>/tutorial, while the youki binary is in <repository-root>.
I fixed the mismatch.

[yihuaf]

Thank you for the catch. But can I ask you to change the tutorial to be done in the root, instead of tutorial? In another word, can we remove https://github.com/containers/youki/pull/283/files#diff-b335630551682c19a781afebcf4d07bf978fb1f8ac04c6bf87428ed5106870f5R110
and update the path to be from the project root?

Edit: actually let's try this and see if it make better sense to people this way.

[codecov-commenter]

Codecov Report

Merging #283 (0803ee9) into main (1770f34) will increase coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #283      +/-   ##
==========================================
+ Coverage   69.61%   69.62%   +0.01%     
==========================================
  Files          46       46              
  Lines        5660     5660              
==========================================
+ Hits         3940     3941       +1     
+ Misses       1720     1719       -1     

[kenoss]

Thanks for your review and suggestion. An obstruction for the suggestion is youki spec can only generate config.json in the current directory and it needs additional mv. I feel the current version is simple enough, so I agree with your conclusion.