fix: rotateAuthAccount failed

When `giveOwnership` and `addOwnedAccount` are executed in the same transaction
`rotateAuthAccount` will be called twice.
However, during the second call, since authAcctPath is the same, it will cause `acct.linkAccount` to return `nil` as a result.

contracts/HybridCustody.cdc

@@ -1023,7 +1023,10 @@ pub contract HybridCustody {
             // NOTE: This path cannot be sufficiently randomly generated, an app calling this function could build a
             // capability to this path before it is made, thus maintaining ownership despite making it look like they
             // gave it away. Until capability controllers, this method should not be fully trusted.
-            let authAcctPath = "HybridCustodyRelinquished".concat(HybridCustody.account.address.toString()).concat(getCurrentBlock().height.toString())
+            let authAcctPath = "HybridCustodyRelinquished"
+                .concat(HybridCustody.account.address.toString())
+                .concat(getCurrentBlock().height.toString())
+                .concat((pathsToUnlink.length + 1).toString()) // ensure that the path is different from the previous one
             let acctCap = acct.linkAccount(PrivatePath(identifier: authAcctPath)!)!
 
             self.acct = acctCap