refactor: update comment for better explanation

Signed-off-by: addrian-77 <lunguadrian30@gmail.com>

Author: addrian-77

tockloader-lib/src/command_impl/probers/erase_apps.rs

@@ -17,7 +17,9 @@ impl CommandEraseApps for ProbeRSConnection {
         let mut loader = session.target().flash_loader();
 
         let address = settings.start_address;
-        // // (adi): a single 0x0 byte is enough to invalidate the header and erase all programs
+        // A single 0x0 byte is enough to invalidate the tbf header and make it all programs 
+        // unreadable to tockloader. This does mean app information will still exist on the board, 
+        // but they will be overwritten when the space is needed.
         loader.add_data((address as u32).into(), &[0x0])?;
 
         let mut options = DownloadOptions::default();