chore: Fix spelling

Author: epage

src/report.rs

@@ -51,7 +51,7 @@ impl Report {
         //that calls panic hook
         const SKIP_FRAMES_NUM: usize = 8;
         //We take padding for address and extra two letters
-        //to padd after index.
+        //to pad after index.
         const HEX_WIDTH: usize = mem::size_of::<usize>() + 2;
         //Padding for next lines after frame's address
         const NEXT_SYMBOL_PADDING: usize = HEX_WIDTH + 6;