feat: update readme

README.md

@@ -1,12 +1,13 @@
 # MSH
-- a toy shell implementation
+- a toy shell implementation in C
 
 ## What it can do
 - handle text input
 - run binaries
 - change directory
+- command history
 
 ## What it can't do
 - any sort of scripting, variables
-- no fatal memory corruption bugs
-- pretty colors and themes :(
+- memory safety
+