docs: remove warning about pruned nodes

This removes a warning in the documentation saying that pruned nodes are
not supported. This is no longer the case as [pruning is supported since
0.13](https://github.com/lightningnetwork/lnd/pull/5154). So instead it
now says pruning is supported and notes the version and implications of
pruning.

docs/release-notes/release-notes-0.14.0.md

@@ -16,6 +16,11 @@ addholdinvoice call](https://github.com/lightningnetwork/lnd/pull/5533).
 * [A new build target itest-race](https://github.com/lightningnetwork/lnd/pull/5542) 
   to help uncover undetected data races with our itests.
 
+# Documentation
+
+* [Outdated warning about unsupported pruning was replaced with clarification that LND **does**
+  support pruning](https://github.com/lightningnetwork/lnd/pull/5553)
+
 # Misc
 
 * The direct use of certain syscalls in packages such as `bbolt` or `lnd`'s own
@@ -45,4 +50,4 @@ to make LNDs payment throughput (and latency) with better when using etcd.
 # Contributors (Alphabetical Order)
 * ErikEk
 * Zero-1729
-* Oliver Gugger
+* Oliver Gugger