Update binary-data.md (#8619)

Binary notation ("0b") is appropriate instead of hexadecimal notation ("0x").

docs/api/binary-data.md

@@ -70,14 +70,14 @@ const buf = new ArrayBuffer(4);
 const dv = new DataView(buf);
 dv.setUint8(0, 3); // write value 3 at byte offset 0
 dv.getUint8(0); // => 3
-// [0x11, 0x0, 0x0, 0x0]
+// [0b00000011, 0b00000000, 0b00000000, 0b00000000]
 ```
 
 Now let's write a `Uint16` at byte offset `1`. This requires two bytes. We're using the value `513`, which is `2 * 256 + 1`; in bytes, that's `00000010 00000001`.
 
 ```ts
 dv.setUint16(1, 513);
-// [0x11, 0x10, 0x1, 0x0]
+// [0b00000011, 0b00000010, 0b00000001, 0b00000000]
 
 console.log(dv.getUint16(1)); // => 513
 ```