[patch] Change old Dxc logos for the new logos in Footer component

[PelayoFelgueroso]

Checklist
(Check off all the items before submitting)

• Build process is done without errors. All tests pass in the /lib directory.
• Self-reviewed the code before submitting.
• Meets accessibility standards.
• Added/updated documentation to /website as needed.
• Added/updated tests as needed.

Purpose
Remove old Dxc logos and add new ones to the Footer component

[raquelarrojo]

Please @PelayoFelgueroso replace the Header logos to the new branding ones for the Chromatic tests also.