Remove ! from todo!() in comments (#8643)

This practice makes it difficult to locate todo!s in my code when I'm
working. Let's take out the bang if we want to keep doing this.

Release Notes:

- N/A

crates/terminal/src/terminal.rs

@@ -399,7 +399,7 @@ impl TerminalBuilder {
         #[cfg(unix)]
         let (fd, shell_pid) = (pty.file().as_raw_fd(), pty.child().id());
 
-        // todo!("windows")
+        // todo("windows")
         #[cfg(windows)]
         let (fd, shell_pid) = (-1, 0);
 
@@ -667,7 +667,7 @@ impl Terminal {
     fn update_process_info(&mut self) -> bool {
         #[cfg(unix)]
         let mut pid = unsafe { libc::tcgetpgrp(self.shell_fd as i32) };
-        // todo!("windows")
+        // todo("windows")
         #[cfg(windows)]
         let mut pid = -1;
         if pid < 0 {