Fix some typos in comments (#7169)

This PR fixes a couple typos I found in some comments/doc comments.

Release Notes:

- N/A

crates/command_palette/src/command_palette.rs

@@ -137,7 +137,7 @@ impl Clone for Command {
 
 /// Hit count for each command in the palette.
 /// We only account for commands triggered directly via command palette and not by e.g. keystrokes because
-/// if an user already knows a keystroke for a command, they are unlikely to use a command palette to look for it.
+/// if a user already knows a keystroke for a command, they are unlikely to use a command palette to look for it.
 #[derive(Default)]
 struct HitCounts(HashMap<String, usize>);