HADOOP-14052. Fix dead link in KMS document. Contributed by Christina Vu.

Change-Id: I7093f443d93927184196f62f02cc106a2c89e9cf

hadoop-common-project/hadoop-kms/src/site/markdown/index.md.vm

@@ -956,7 +956,7 @@ $H4 Re-encrypt Encrypted Key With The Latest KeyVersion
 
 This command takes a previously generated encrypted key, and re-encrypts it using the latest KeyVersion encryption key in the KeyProvider. If the latest KeyVersion is the same as the one used to generate the encrypted key, the same encrypted key is returned.
 
-This is usually useful after a [Rollover](Rollover_Key) of an encryption key. Re-encrypting the encrypted key will allow it to be encrypted using the latest version of the encryption key, but still with the same key material and initialization vector.
+This is usually useful after a [Rollover](#Rollover_Key) of an encryption key. Re-encrypting the encrypted key will allow it to be encrypted using the latest version of the encryption key, but still with the same key material and initialization vector.
 
 *REQUEST:*