update readme

README.md

@@ -1,25 +1,25 @@
 # UDP_CHAT
 
 ## BUILDING
-```bash
+```sh
 make build
 ```
 
 ## INSTALLING
-```
+```sh
 sudo make install
 ```
 
 ## MAKING DEB PACKAGE
-```
+```sh
 make debpkg
 ```
 
 ## MAKING ARCHLINUX PACKAGE
-```
+```sh
 make archlinuxpkg
 ```
 ### OR
-```
+```sh
 makepkg -f
 ```