Updated Working on exaequOS (markdown)

Working-on-exaequOS.md

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 ## exaequOS
 
-exaequOS (https://exaequos.com) is a Unix-like operating system fully running in a Web browser. It allows you to build and share cross platform applications with various languages C, C++, Javascript, Lua, Tcl, Scheme, Forth, etc... There are running in Web Assemmbly in the Web browser.
+exaequOS (https://exaequos.com) is a Unix-like operating system fully running in a Web browser. It allows you to build and share cross platform applications written in various languages C, C++, Javascript, Lua, Tcl, Scheme, Forth, etc... There are running in WebAssembly in the Web browser.
 
 #### Developer's guide