[examples] Use styletron-react 6.1.0

[gergelyke]

5.x uses react 16

(base) ☁  with-styletron [canary] npm i
npm ERR! code ERESOLVE
npm ERR! ERESOLVE unable to resolve dependency tree
npm ERR!
npm ERR! While resolving: undefined@undefined
npm ERR! Found: [email protected]
npm ERR! node_modules/react
npm ERR!   react@"^18.2.0" from the root project
npm ERR!
npm ERR! Could not resolve dependency:
npm ERR! peer react@"^16.8.0" from [email protected]
npm ERR! node_modules/styletron-react
npm ERR!   styletron-react@"5.2.7" from the root project
npm ERR!
npm ERR! Fix the upstream dependency conflict, or retry
npm ERR! this command with --force or --legacy-peer-deps
npm ERR! to accept an incorrect (and potentially broken) dependency resolution.
npm ERR!
npm ERR!
npm ERR! For a full report see:
npm ERR! /Users/gergelynemeth/.npm/_logs/2023-02-11T19_11_05_548Z-eresolve-report.txt

npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/gergelynemeth/.npm/_logs/2023-02-11T19_11_05_548Z-debug-0.log

cc @tajo @rtsao