[fix] handle BC 1.61 compatibility

Author: kares

src/main/java/org/jruby/ext/openssl/x509store/PEMInputOutput.java

@@ -992,7 +992,7 @@ public static void writeX509Request(Writer _out, PKCS10Request obj) throws IOExc
 
     public static void writeDSAPrivateKey(Writer _out, DSAPrivateKey obj, CipherSpec cipher, char[] passwd) throws IOException {
         BufferedWriter out = makeBuffered(_out);
-        PrivateKeyInfo info = new PrivateKeyInfo((ASN1Sequence) new ASN1InputStream(getEncoded(obj)).readObject());
+        PrivateKeyInfo info = PrivateKeyInfo.getInstance(new ASN1InputStream(getEncoded(obj)).readObject());
         ByteArrayOutputStream bOut = new ByteArrayOutputStream();
         ASN1OutputStream aOut = new ASN1OutputStream(bOut);