E2E Adopter Journey | Provide Data Exchange Tutorial in README.md

[evegufy]

Please provide Data Exchange Tutorial in README.md:
https://github.com/eclipse-tractusx/tractus-x-umbrella/blob/umbrella-0.16.0/charts/umbrella/README.md#data-exchange

Providing a link to the TX website https://eclipse-tractusx.github.io/docs/tutorials/e2e, where the tutorial (which should be updated for the usage of the umbrella) should be fine.

[stephanbcbauer]

Oha, missed this issue completely. Sorry. Will work on this next week

[matbmoser]

Confirm tomorrow with @JohannesARENA2036 if @mgarciaLKS and @CDiezRodriguez can do it

Shall come to monday meetings

[matbmoser]

#152
#151