Rename files to fixed cached style and members logos

[Xpirix]

I think the style and the members' logo image files are cached by the CDN.
Renaming them should override this.

Cc @GeoSander

[GeoSander]

Yes, the logos look good now, thanks!
Surely there must be an easier/better way to force a CDN update though.. 😅

[Xpirix]

Yes, that's one of the issues that should be managed in a better way, through webpack and hashed static files, on the upcoming branding update.