docs: update deps list

Close #440

Author: rafaelmardojai

README.md

@@ -50,10 +50,11 @@ sudo apt-get install dialect
 
 - Python 3 (>=3.10) `python`
 - PyGObject (>=3.51.0) `python-gobject`
-- GTK4 (>= 4.16.0) `gtk4`
-- libadwaita (>= 1.6.0) `libadwaita`
+- GTK4 (>= 4.17.5) `gtk4`
+- libadwaita (>= 1.7.0) `libadwaita`
 - libsoup (>= 3.0) `libsoup`
 - libsecret
+- libspelling
 - GStreamer 1.0 `gstreamer`
 - Meson `meson`
 - Ninja `ninja`