gui/updater: Stop retries after a few errors (#2233)
gui/updater: Stop retries after a few errors (#2233)

Instead of trying to update the app forever in case we're encountering
a persistent error, we will only try 5 times and skip the update if we
still can't download it at that point.
cozy-labs/cozy-desktop,cozy-labs/cozy-desktop,cozy-labs/cozy-desktop,cozy-labs/cozy-desktop