docs: typo fixes in changelog

CHANGELOG.md

@@ -33,12 +33,12 @@ Take this line and fix version with current ($CV)
 - Open `$EDITOR` (only GUI IDE right now) when opening a new exo
 - Show checks details with a nice word level diff generated by `similar`.
 - Show a Solution page with basic syntax highlighting via `syntect`
-- Support an exos structure with course - skills - exo hierarchy, with metadata described in TOML
-- Enable parsing TOML files directly into Rust structs via `serde` and `toml` crates.
+- Support an exo structure with course - skills - exo hierarchy, with metadata described in TOML
+- Enable parsing TOML files directly into Rust structs using `serde` and `toml` crates.
 - Generate a lot of various errors for parsing, process and workers execution. We don't display them yet. When running `plx` in a folder without `course.toml`, the TUI will not start. It only displays skills and exos that were successfully parsed.
 - Create examples exos for manual and automated testings under folder `examples`
 - Switch to next exo when exo is done
-- Start to store exo state (In progress, Done) but this is not fully working, therefor not displayed
+- Start to store exo state (In progress, Done) but this is not fully working, therefore not displayed
 - Create a logo ! Inspired from Delibay and PRJS gradient styles
 - Write logs to `debug.log` via crate `log` and `simplelog` to see events received by core and not make noise in the UI