Using `matrix_synapse_*` variables within the `matrix-grafana` role
is not a good practice.

We now have a `matrix_grafana_default_home_dashboard_path` variable
with a good universal default value and we override it via
`group_vars/matrix_servers` based on enabled components, etc.

This is a better fix for https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/2133

We shouldn't be using it in the role (`tasks/setup.yml`) without
defining at least some default value in the role itself.

We've always had the override in `group_vars/matrix_servers`,
so the variable was essentially defined (at the playbook level), but
that's not the right way to do things.

synapse: match upstream rate limit defaults

Do not restart postmoogle during installation

Reason: during a fresh install, when there is no synapse yet, systemd unit fails to start, thus whole play fails

whatsapp: do not turn on synapse only options

Update Postmoogle 0.9.3 -> 0.9.4

* send emails in UTF-8 👋
* fix options descriptions
* add SMTP auth
* allow sending emails from your apps and scripts using postmoogle as email provider

dendrite: update image tag version

- 0.9.9 (https://github.com/matrix-org/dendrite/releases/tag/v0.9.9)

Improve maubot doc

Add two important informations:
- The `mbc` commands must be ran in the docker container
- Not using this method prevent from using encrypted rooms with the bot

Update Postmoogle 0.9.2 -> 0.9.3

Update Honoroit 0.9.14 -> 0.9.15

Update Grafana 9.1.5 -> 9.1.6

Update ddclient v3.9.1-ls98 -> v3.9.1-ls99

Update mautrix-instagram 0.2.0 -> 0.2.1

Updated the Element settings.

Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/2114

Update Honoroit 0.9.13 -> 0.9.14

Update mautrix-signal 0.3.0 -> 0.4.0

dendrite: update config to match upstream defaults

change stream writer worker metrics range start

Update Cinny 2.1.3 -> 2.2.0

Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/2108

`ephemeral_events`` and `sync_with_custom_puppets` have been flipped
to keep up with the default upstream config:
b33bd9c4a7

fix: typo in changelog.md

Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/2103

Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/2104

Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/2105

Related to https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/2103

Major improvements to Synapse workers