[docs] path to descriptors.md fixed

Author: meeDamian

doc/release-notes/release-notes-0.17.0.md

@@ -270,7 +270,7 @@ Low-level RPC changes
 
 - The new RPC `scantxoutset` can be used to scan the UTXO set for entries
   that match certain output descriptors. Refer to the [output descriptors
-  reference documentation](doc/descriptors.md) for more details. This call
+  reference documentation](/doc/descriptors.md) for more details. This call
   is similar to `listunspent` but does not use a wallet, meaning that the
   wallet can be disabled at compile or run time. This call is experimental,
   as such, is subject to changes or removal in future releases.