ci: Upgrade cozy-stack requirements and recommandations

[taratatach]

We upgrade the Go and CouchDB versions to reflect changes in cozy-stack's requirements and recommandations.

Please make sure the following boxes are checked:

• [x] PR is not too big
• [x] it improves UX & DX in some way
• [ ] it includes unit tests matching the implementation changes
• [x] it includes scenarios matching a new behaviour or has been manually tested
• [x] it includes relevant documentation