Update INSTALL.md

Author: overtake

INSTALL.md

@@ -6,7 +6,7 @@
 	git clone https://github.com/overtake/TelegramSwift.git --recurse-submodules
 	```
 2.  ```brew install cmake ninja openssl@1.1 zlib autoconf libtool automake yasm pkg-config```
-3.  sh %project_dir%/scripts/configure_frameworks.sh
+3.  ```sh %project_dir%/scripts/configure_frameworks.sh```
 4. Open `Telegram-Mac.xcworkspace` in the latest XCode.  
 5. Build.