add prdoc

prdoc/pr_3108.prdoc

@@ -0,0 +1,18 @@
+# Schema: Polkadot SDK PRDoc Schema (prdoc) v1.0.0
+# See doc at https://raw.githubusercontent.com/paritytech/polkadot-sdk/master/prdoc/schema_user.json
+
+title: revert paritytech/polkadot#6577 & related changes
+
+doc:
+  - audience: Node Dev
+    description: |
+      Moves BEEFY related pallets behind `session_pallet`.
+      Effects that each `MmrLeaf` in the MMR generated by `mmr_pallet` for `block<N>` references the `next_auth_set` of `block<N>` and not `block<N-1>`.
+      Breaking change for proofs generated by `mmr_generateProof`
+  - audience: Runtime Dev
+    description: |
+      Moves BEEFY related pallets behind `session_pallet`.
+      Effects that each `MmrLeaf` in the MMR generated by `mmr_pallet` for `block<N>` references the `next_auth_set` of `block<N>` and not `block<N-1>`.
+
+
+crates: []