lecture07: улучшена иллюстрация перестановки байтов

lectures/lecture07/README.md

@@ -360,12 +360,12 @@ std::memcpy(&length, payload, sizeof(length));  // куда, откуда, ск
 →| 8|←
   XX YY ZZ WW
   
-  XX 00 00 00 >> 24
-  00 YY 00 00 >>  8
-  00 00 ZZ 00 <<  8
-  00 00 00 WW << 24
+  XX 00 00 00 >> 24 → 00 00 00 XX
+  00 YY 00 00 >>  8 → 00 00 YY 00
+  00 00 ZZ 00 <<  8 → 00 ZZ 00 00
+  00 00 00 WW << 24 → WW 00 00 00
   
-  WW ZZ YY XX
+                      WW ZZ YY XX
 ```
 
 То же самое на C++: