Merge pull request #2490 from riscv/2489-need-to-escape-one-more-in-vector-crypto

Escape a { character

Author: wmat

src/vector-crypto.adoc

@@ -763,7 +763,7 @@ Instructions for accelerating
 encryption, decryption, and key-schedule
 functions of the SM4 block cipher.
 
-The SM4 block cipher is specified in _32907-2016: {SM4} Block Cipher Algorithm_
+The SM4 block cipher is specified in _32907-2016: \{SM4} Block Cipher Algorithm_
 cite:[gbt:sm4]
 
 There are other various sources available that describe the SM4 block cipher.