CI: Avoid molecule 3.5.x

Molecule 3.5.1 was released by accident [1] and is breaking our
kayobe-tox-molecule job. Avoid 3.5.x releases for now.

[1] https://github.com/ansible-community/molecule/discussions/3240

Change-Id: Ifd75f704177751ec740475bcce8a9f7b8a1578f3

molecule-requirements.txt

@@ -3,7 +3,7 @@
 # process, which may cause wedges in the gate later.
 
 docker # Apache-2.0
-molecule # MIT
+molecule<3.5.0 # MIT
 molecule-docker # MIT
 pytest-molecule # MIT
 pytest-testinfra