* Fix ArangoDB logo image in Readme

it wasn't working properly on some sites because of incorrect headers/redirects at main ArangoDB site.

e.g. ![at pkg.go.dev](https://i.imgur.com/TZgdbJt.png

)

* Update README.md

* Update README.md

* test

* Update README.md

Co-authored-by: jwierzbo <jakub.wierzbowski@arangodb.com>