add custom fonts to readme

Author: aIIison

README.md

@@ -1,16 +1,21 @@
 ![](./doc/logo.png)
 
-# screenshots
+## screenshots
 <img src="./doc/1.png" width="400"> <img src="./doc/2.png" width="400">
 <img src="./doc/3.png" width="400"> <img src="./doc/4.png" width="400">
 
-# extra features
-| minimal net_graph       | original contimes & cm timer                                            | font(s) for sar hud     |
-| ----------------------- | ----------------------------------------------------------------------- | ----------------------- |
+## extra features
+| minimal net_graph                   | original contimes & cm timer                                            | font(s) for sar hud     |
+| ----------------------------------- | ----------------------------------------------------------------------- | ----------------------- |
 | <img src="./doc/5.png" width="220"> | <img src="./doc/7.png" width="180"> <img src="./doc/6.png" width="180"> | <img src="./doc/8.png"> |
 
-# installation
+## installation
 1. download the latest [release](https://github.com/aIIison/hud/releases/)
 2. rename `update` directory to `portal2_dlc3`
 3. create folder `portal2_dlc4` (move all your existing vpks here)
 4. extract the files in `portal2_dlc4`
+
+## using the custom font(s)
+currently there's one custom font included
+- should be font index `223`
+- in case it's not, use `sar_font_list` and find `Typoster`