Fix the sense of the --no-reset flag

The argument was set to 'SetFalse', so when present was setting the bool
to false, but the test was also negated, so reset was opposite of
desired.

src/main.rs

@@ -178,7 +178,7 @@ struct WriteArgs {
     size: Option<u32>,
 
     /// Don't reset the microcontroller after writing
-    #[arg(short, long, action=ArgAction::SetFalse)]
+    #[arg(short, long)]
     no_reset: bool,
 
     /// Erase method to use before writing