fix: test case expecting old error

Signed-off-by: Daniel Bluhm <dbluhm@pm.me>

aries_cloudagent/vc/ld_proofs/crypto/tests/test_wallet_key_pair.py

@@ -76,4 +76,4 @@ async def test_from_verification_method_x_no_public_key_base58(self):
 
         with self.assertRaises(LinkedDataProofException) as context:
             key_pair.from_verification_method({})
-        assert "no publicKeyBase58" in str(context.exception)
+        assert "Unrecognized" in str(context.exception)