add release note about supporing non-TRUC <minrelay txns

doc/release-notes-33892.md

@@ -0,0 +1,8 @@
+P2P and network changes
+-----------------------
+
+- Transactions participating in one-parent-one-child package relay can now have the parent
+    with a feerate lower than the `-minrelaytxfee` feerate, even 0 fee. This expands the change
+    from 28.0 to also cover packages of non-TRUC transactions. Note that in general the
+    package child can have additional unconfirmed parents, but they must already be
+    in-mempool for the new package to be relayed. (#33892)