Amélioration page finale

public/images/Score_A.png

public/images/Score_B.png

public/images/Score_C.png

public/images/Score_D.png

public/images/Score_E.png

src/app/app.component.html

...autoeval/autoeval-endpage/autoeval-endpage.component.html

...s/autoeval/autoeval-endpage/autoeval-endpage.component.ts

src/app/views/header/header.component.css

src/app/views/header/header.component.html