Translate Velo star in English

[FlorentDSGree]

• [x] Recreate the graphs to have legend and text in English
• [x] Translate the content in English
• [x] Update the index.html
• [x] Upload to github

[FlorentDSGree]

• Not all the graphs have been re-created, some have been copy-pasted and then text has been translated from French to English