fix: Correct BBS signing function.

Signed-off-by: Markus Sabadello <markus@danubetech.com>

Author: peacekeeper

src/main/java/com/danubetech/keyformats/crypto/impl/BLS12381_G2_BBSPlus_PrivateKeySigner.java

@@ -19,7 +19,7 @@ public byte[] sign(byte[] content) throws GeneralSecurityException {
 
         try {
 
-            return Bbs.sign(this.getPrivateKey().secretKey, this.getPrivateKey().publicKey, new byte[][]{content});
+            return Bbs.blsSign(this.getPrivateKey().secretKey, this.getPrivateKey().publicKey, new byte[][]{content});
         } catch (GeneralSecurityException ex) {
 
             throw ex;