deepimagej 404 for source and documentation field

[FynnBe]

These links need an update :

• models/manifest.bioimage.io.yaml

  Line 53 in 5fdb039

  source: https://deepimagej.github.io/deepimagej/index.html

• models/manifest.bioimage.io.yaml

  Line 61 in 5fdb039

  documentation: https://deepimagej.github.io/deepimagej/index.html