rename hivesigner tutorial folder

.../devportal-tutorials-js/tutorials/02_hivesigner/README.md

...ials/02_hivesigner/images/steemconnect_account_create.png

...tutorials/02_hivesigner/images/steemconnect_dashboard.png

...-js/tutorials/02_hivesigner/images/steemconnect_login.png

...js/tutorials/02_hivesigner/images/steemconnect_myapps.png

...s/tutorials/02_hivesigner/images/steemconnect_new_app.png

...js/tutorials/02_hivesigner/images/steemconnect_signin.png

...s/devportal-tutorials-js/tutorials/02_hivesigner/index.js

...al-tutorials-js/tutorials/02_hivesigner/package-lock.json

...vportal-tutorials-js/tutorials/02_hivesigner/package.json

...portal-tutorials-js/tutorials/02_hivesigner/public/app.js

...al-tutorials-js/tutorials/02_hivesigner/public/index.html

...tal-tutorials-js/tutorials/02_hivesigner/public/style.css

...al-tutorials-js/tutorials/02_hivesigner/webpack.config.js