matrix/Element/README.md: fix formatting

matrix/Element/README.md

@@ -1,17 +1,32 @@
-Element config.json
+# Element config.json
 
-Initially copied from https://develop.element.io/config.json, but modified.
+Initially copied from https://develop.element.io/config.json, but it has
+evolved.
 
-Placement:
+<!-- editorconfig-checker-disable -->
+<!-- prettier-ignore-start -->
 
-Flatpak: `~/.var/app/im.riot.Riot/config/Riot/config.json`
+<!-- START doctoc generated TOC please keep comment here to allow auto update -->
+<!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
 
-- or `~/.var/app/im.riot.Riot/config/Element-PROFILENAMEHERE/config.json`
-- Linux: `~/.config/Element/config.json` or `~/.config/Element-PROFILENAMEHERE/config.json`
-  - failing that it appears to read `~/.config/Riot/*` should that exist.
-- Windows: `%APPDATA%\Element\config.json`
+- [Placement](#placement)
+- [Labs features for config.json](#labs-features-for-configjson)
 
-Labs features:
+<!-- END doctoc generated TOC please keep comment here to allow auto update -->
+
+<!-- prettier-ignore-end -->
+<!-- editorconfig-checker-enable -->
+
+## Placement
+
+- Flatpak: `~/.var/app/im.riot.Riot/config/Riot/config.json`
+  or `~/.var/app/im.riot.Riot/config/Element-PROFILENAMEHERE/config.json`
+- Linux outside of flatpak: `~/.config/Element/config.json` or `~/.config/Element-PROFILENAMEHERE/config.json`
+  - failing that it appears to also read `~/.config/Riot/*` should that exist.
+- Windows: `%APPDATA%\Element\config.json` or youcan figure out the profile
+  name if you use Windows.
+
+## Labs features for config.json
 
 - https://github.com/vector-im/element-web/blob/develop/docs/labs.md
 - https://github.com/matrix-org/matrix-react-sdk/blob/develop/src/settings/Settings.tsx