Fix typo in diagnostics page
Fix typo in diagnostics page

code-cracker/code-cracker.github.io,SergeyZhurikhin/code-cracker.github.io,akamud/code-cracker.github.io,code-cracker/code-cracker.github.io,akamud/code-cracker.github.io,SergeyZhurikhin/code-cracker.github.io,akamud/code-cracker.github.io,code-cracker/code-cracker.github.io,SergeyZhurikhin/code-cracker.github.io