New Matrix v12 rooms not supported by chat integration

Room IDs in Matrix have changed from a format like !XobthiyrsXshZCJPxh:privacyguides.org to a format like !0EgO6JUj4upTN5XF70_Ox0Wg0gFVD8WKJxIdFGiYL_4 following a security release on August 11th.

Subsequently, rooms on Matrix are no longer able to be added in the chat integration plugin due to the input field validation:

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Yikes, in the interim I am putting a pr-welcome on this in case the community can help out.