fix comment

Author: ananas-block

programs/system/src/cpi_context/process_cpi_context.rs

@@ -22,17 +22,14 @@ use crate::{
     errors::SystemProgramError, Result,
 };
 
-/// Diff refactored Cpi context account:
-/// 1. return Cpi context instead of combined data.
-///
 /// Cpi context enables the use of input compressed accounts owned by different
 /// programs.
 ///
 /// Example:
-/// - a transaction calling a pda program needs to transfer tokens and modify a
+/// - a transaction invokes a pda program, which transfers tokens and modifies a
 ///   compressed pda
-/// - the pda is owned by pda program while the tokens are owned by the compressed
-///   token program
+/// - the compressed pda is owned by pda program while the
+///   compressed token accounts are owned by the compressed token program
 ///
 /// without cpi context:
 /// - naively invoking each compressed token via cpi and modifying the pda