📝 Adds Kebab Case notice

Signed-off-by: Bjorn Lammers <walkxnl@gmail.com>

CONTRIBUTING.md

@@ -4,9 +4,9 @@ Thank you for your interest in contributing to our icon repository! To ensure th
 
 ## 🌟 Icon Specifications
 
-- Each icon should be in **PNG** format and have a height of exactly **512px**. Width does not matter. ❗️(No upscales! If the correct size cannot be found, a smaller height will be accepted.)
 - Each icon should include both a **PNG** and **SVG** version. If an **SVG** cannot be found, then only a **PNG** version is required.
-- Icons should be named after their full name, with spaces replaced by dashes. For example, "Facebook Messenger" should be named `facebook-messenger.png`.
+- Each icon should be in **PNG** format and have a height of exactly **512px**. Width does not matter. ❗️(No upscales! If the correct size cannot be found, a smaller height will be accepted.)
+- Icons should be named after their full name, using the [Kebab Case](https://wiki.c2.com/?KebabCase) naming convention. For example, "Facebook Messenger" should be named `facebook-messenger.png`.
 - Monochrome icons should default to a dark version. Light versions should be named `service-light.png`. If a light version is not available, use [https://pinetools.com/colorize-image](https://pinetools.com/colorize-image) to change its color.