[adwaita-icon-theme] README: minor tweaks

[Jakub Steiner <jimmac src gnome org>]

commit 73a4a31d62b25988bc522908a709a17d89292a22
Author: Jakub Steiner <jimmac gmail com>
Date:   Thu Apr 21 13:03:59 2022 +0200

    README: minor tweaks

 README.md | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/README.md b/README.md
index e77437a9d..d8eed4a3a 100644
--- a/README.md
+++ b/README.md
@@ -9,14 +9,14 @@ If you're a core GNOME application maintainer and you have an icon need that bri
 For an up to date guide on how to use and how to design GNOME style icons, see the GNOME User Interface 
Guidelines: [UI Icons](https://developer.gnome.org/hig/guidelines/ui-icons.html) and [App 
Icons](https://developer.gnome.org/hig/guidelines/app-icons.html).
 
 ## Building and Contributing to Adwaita
-Symbolic icons are no longer maintained using hand rolled ruby script and inkscape to render them out, but 
instead shares the same workflow as 3rd party symbolics, the [icon 
devkit](https://gitlab.gnome.org/Teams/Design/icon-development-kit).
+The icon set for system components shares the same workflow as 3rd party app symbolics, the [icon 
devkit](https://gitlab.gnome.org/Teams/Design/icon-development-kit).
 
-While many legacy symbolics only live as the exported individual SVGS in `Adwaita/scalable/`, the 
replacements are maintained in `src/symbolic/core.svg`. The contexts are [no longer 
used](https://gitlab.gnome.org/GNOME/adwaita-icon-theme/-/issues/73) and all icons go into `actions`. Please 
refer to the [Devkit guidelines](https://gitlab.gnome.org/Teams/Design/icon-development-kit) on how to 
structure the metadata.
+While many legacy symbolics only live as the exported individual SVGS in `Adwaita/scalable/`, the 
replacements are maintained in `src/symbolic/core.svg`. Using icon categories/contexts are [no longer 
used](https://gitlab.gnome.org/GNOME/adwaita-icon-theme/-/issues/73) and all new icons go into `actions`. 
Please refer to the [Devkit guidelines](https://gitlab.gnome.org/Teams/Design/icon-development-kit) on how to 
structure the metadata.
 
 Do note that no new additions should be made unless very thoroughly discussed. *a-i-t* is the wrong way to 
reuse icon assets (no API, false promise of stability).
 
 ### Recoloring
-The color of the icon set is defined at runtime by the gtk theme. Every single icon from the set is actually 
embedded inside an xml container that has a stylesheet overriding the colors.
+The color of the icon set is defined at runtime by [gtk](https://gtk.org). Every single icon from the set is 
actually embedded inside an xml container that has a stylesheet overriding the colors.
 
 There is a couple of things the icon author needs to be aware of and a few things s/he can make use of. The 
stylesheet is setting the color of the fill for all rectangles and paths. **DO NOT** leave any rectangles or 
paths with no fill/stroke thinking it's invisible.