doc: encoding spec links

Author: ChALkeR

README.md

@@ -92,6 +92,9 @@ See [the list of encodings](https://encoding.spec.whatwg.org/#names-and-labels).
 
 ### `@exodus/bytes/single-byte.js`
 
+Decode the legacy single-byte encodings according to the [Encoding standard](https://encoding.spec.whatwg.org/)
+([§9](https://encoding.spec.whatwg.org/#legacy-single-byte-encodings)).
+
 ##### `createSinglebyteDecoder(encoding, loose = false)`
 
 Create a decoder for a supported one-byte `encoding`.
@@ -100,6 +103,12 @@ Returns a function `decode(arr)` that decodes bytes to a string.
 
 ### `@exodus/bytes/multi-byte.js`
 
+Decode the legacy multi-byte encodings according to the [Encoding standard](https://encoding.spec.whatwg.org/)
+([§10](https://encoding.spec.whatwg.org/#legacy-multi-byte-chinese-(simplified)-encodings),
+[§11](https://encoding.spec.whatwg.org/#legacy-multi-byte-chinese-(traditional)-encodings),
+[§12](https://encoding.spec.whatwg.org/#legacy-multi-byte-japanese-encodings),
+[§13](https://encoding.spec.whatwg.org/#legacy-multi-byte-korean-encodings)).
+
 ##### `createMultibyteDecoder(encoding, loose = false)`
 
 Create a decoder for a supported legacy multi-byte `encoding`.