Also fixes the appservice and homeserver tokens for the Googlechat bridge,
so that they're not the same as the ones for the Hangouts bridge.

Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/1322

GoMatrixHosting v0.6.2

Update matrix-appservice-slack (1.5.0 -> 1.8.0)

Update configuring-playbook-dimension.md

I am not using this bridge and haven't tested this but multiple people have said 1.5.0 isn't working and 1.8.0 works for them so it seems to make sense to update.

https://github.com/matrix-org/matrix-appservice-slack/issues/618#issuecomment-929849093

add how to generate htpasswd

Gomatrixhosting testing

for matrix_nginx_proxy_proxy_synapse_metrics_basic_auth_key
resolves #1308