Update my URL since toot.zone was shut down.

Update List-of-Mastodon-instances.md

Add indigo.zone to list of instances

Adds Oulipo.social to Mastodons list

Add mastodon.fun

Added masto.razrnet.fr

Added mastodon.host in the list of instances

Add manx.social instance

Update List-of-Mastodon-instances.md

Add an instance.

Add an instance

Add Northeastern University Mastodon

Add an instance

add my instance

Added an instance to the list

Update List-of-Mastodon-instances.md

Update List-of-Mastodon-instances.md

Add mastodon.elao.com instance

Add infinimatix.net to instance list

Added off-the-clock.us to the list of instances