fix: Dependency versions following new roles tag

[slothkong]

Hello @xavierabellan,

In the requirements.yml, there was an unattended TODO, left on Aug. 12th (before the different Ansible Roles had a valid git tag assigned to them). It should be now addressed, after the round of releases performed on Sep. 11th:

ewc-flavours/requirements.yml

Lines 3 to 7 in 0a99587

	# TODO: Update version attributes to match MAJOR.MINOR.PATCH version (i.e. the git tag) of the roles,
	# once available. Note that pinning down to the PATCH number in the `version` attribute while
	# referencing only the MINOR version in the role name translates to Ansible Playbooks automatically
	# import the latest fixes for Ansible Roles they depend on, assuming older versions of said Ansible
	# Roles are not cached locally, in the `./roles` or `~/.ansible/roles` directories for example.

IMPORTANT: Currently, the jupyterhub-flavour is likely to fail without manual installation of both ewc-ansible-role-conda-1.0 and ewc-ansible-role-conda-1.1

UPDATE: Opened also a followup PR to index this new version of the Items onto the Community Hub catalog: ewcloud/ewc-community-hub#50