Make installation instructions suggest installing a speech engine (#2061)

Multiple users have had errors with this. This adds verbosity so we
don't need to merge necessarily if you want a very terse installation
process but I think it might be helpful. Talon installation UX remains
rather weak so I think its good to specify

---------

Co-authored-by: pre-commit-ci-lite[bot] <117423508+pre-commit-ci-lite[bot]@users.noreply.github.com>
Co-authored-by: Andreas Arvidsson <andreas.arvidsson87@gmail.com>
Co-authored-by: Phil Cohen <phillip@phillip.io>

Author: 4 people

packages/cursorless-org-docs/src/docs/user/installation.md

@@ -1,6 +1,7 @@
 # Installation
 
 1. Install [Talon](https://talonvoice.com/)
+   - Make sure a speech engine is installed (click the Talon tray icon, then select one from the `Speech Recognition` menu)
 2. Install the [community Talon commands](https://github.com/talonhub/community).
    _(Or see [here](https://github.com/cursorless-dev/cursorless/wiki/Talon-home-requirements) if you prefer not to use community.)_
 3. Install [VSCode](https://code.visualstudio.com/)