Fixed spelling error

doc/Project_suggestions.md

@@ -50,7 +50,7 @@ Symbolic execution engine for MIR internal format
 - Drivers for the Nucleo 64, stm32f401re/stm32f411re, similar to the f3/bluepill support crates
 
 ---
-## Time Triggered Architectuer (RTFM-TTA) 
+## Time Triggered Architecture (RTFM-TTA) 
 - Periodic timers
 - Communication channels/message buffers 
 - Static analysis (for safely bound buffers)