Fix typo in alternative name of P-224 EC curve.

Bug: 25340656
Change-Id: Id9e1c96ca8e7a1786713730c7292ae5246bd223a
diff --git a/docs/html/training/articles/keystore.jd b/docs/html/training/articles/keystore.jd
index aa1ed0a..5323e20 100644
--- a/docs/html/training/articles/keystore.jd
+++ b/docs/html/training/articles/keystore.jd
@@ -442,7 +442,7 @@
       <td>
         <ul>
           <li>Supported sizes: 224, 256, 384, 521</li>
-          <li>Supported named curves: P-224 (secp256r1), P-256 (aka secp256r1 and prime256v1), P-384
+          <li>Supported named curves: P-224 (secp224r1), P-256 (aka secp256r1 and prime256v1), P-384
             (aka secp384r1), P-521 (aka secp521r1)</li>
         </ul>