Update address.md (#1283)

is there a mistake? i checked mainnet actor address and refrence https://github.com/filecoin-project/go-address/blob/5769c0de15a02ef38055aeb277ff159db822c5bc/address.go#L171, it may be blake2b-160,not sha256

Co-authored-by: smagdali <[email protected]>

Author: zengchao1212

content/appendix/address.md

@@ -144,7 +144,7 @@ const (
 |----------|---------------------|
 | protocol |        payload      |
 |----------|---------------------|
-|    2     | 	SHA256(Random) 	 |
+|    2     | blake2b-160(Random) |
 ```
 
 **String**
@@ -153,7 +153,7 @@ const (
 |------------|----------|-----------------------|----------|
 |  network   | protocol |         payload       | checksum |
 |------------|----------|-----------------------|----------|
-| 'f' or 't' |    '2'   |  	SHA256(Random)  	|  4 bytes |
+| 'f' or 't' |    '2'   |  blake2b-160(Random)  |  4 bytes |
                   base32[..................................]
 ```