Update About us page

[ani-kalpachka]

Describe the feature you'd like to request

There are changes related to the teams and team members which we need to reflect on About us page.

Describe the solution you'd like

• Update the team members as described below:

  • Supervisory board members:
    Иван Гойчев, Ана Николова, Юлиян Калдерон, Ивайло Иванов, Станка Черкезова-Калайджиева

  • Мanagement board members: Радослав Божинов, Диана Добрева, Марияна Каролева, Георги Иванов, Здравка Горначка, Иван Милчев, Славчо Иванов

• Remove from Active members section the people that are present in the two sections above in order not to have duplications.

✅ - Remove the Discord image as it is outdated.

✅ - Delete 'Principle that unite us' logic. It is outdated and currently commented (not displayed on the page).

[ani-kalpachka]

Discord image removed, 'Principles that unite us' section deleted: #1901