fix: remove imprecise bias number from PIN_BYTES comment

Author: TheCryptoDonkey

src/encoding.ts

@@ -39,7 +39,7 @@ export function encodeAsWords(
 /**
  * Minimum bytes per digit count to keep max per-value bias below 1%.
  * Each entry is the smallest b where `floor(2^(b×8) / 10^digits) >= 100`,
- * except d=10 which uses b=6 (not b=5) for a tighter 0.004% bias.
+ * except d=10 which uses b=6 (not b=5) for a tighter bias.
  * Index 0 is unused; indices 1–10 correspond to digit counts 1–10.
  */
 const PIN_BYTES: readonly number[] = [0, 2, 2, 3, 3, 3, 4, 4, 5, 5, 6]