tox.ini: Work around build failure due to upstream release

This fixes the master build [1] [1] https://jenkins.softwareheritage.org/job/DLS/job/tests/1210/console

tox.ini: Work around build failure due to upstream release
3bede83d · Antoine R. Dumont · 17b0e7af · 3bede83d
Verified Commit 3bede83d authored 4 years ago by Antoine R. Dumont
--- a/tox.ini
+++ b/tox.ini
@@ -7,6 +7,7 @@ extras =
 deps =
  swh.core[http] >= 0.0.61
  swh.scheduler[testing] >= 0.5.0
+  amqp != 5.0.4
  pytest-cov
  dev: ipdb
 commands =