[damned-lies/develop] docs: add pillow and pyicu in packages to install

[Guillaume Bernard <gbernard src gnome org>]

commit ff87901c7ee5733768ba39362fa5524236d7a6cf
Author: Guillaume Bernard <associations guillaume-bernard fr>
Date:   Sat Sep 17 16:49:01 2022 +0200

    docs: add pillow and pyicu in packages to install

 CONTRIBUTING.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index a3547af4..33c77dd5 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -93,11 +93,11 @@ You can install them on your operating system using the following command line e
 
 * On **Debian** based systems:
   ```bash
-  apt install gettext intltool itstool libmariadbclient-dev libicu-dev libxml2-dev python3-dev yelp-tools 
build-essential
+  apt install gettext intltool itstool libmariadbclient-dev libicu-dev libxml2-dev python3-dev yelp-tools 
build-essential python3-pillow pyicu
   ```
 * On **Fedora** based systems:
   ```
-  dnf install gettext intltool itstool mariadb-devel libicu-devel libxml2-devel python-devel yelp-tools 
@development-tools
+  dnf install gettext intltool itstool mariadb-devel libicu-devel libxml2-devel python-devel yelp-tools 
@development-tools python3-pillow python3-pyicu
   ```
 
 ## Python environment