doc: add release notes

Author: kwvg

doc/release-notes-7099.md

@@ -0,0 +1,16 @@
+Updated RPCs
+------------
+
+* Dash RPCs will no longer permit submitting strings to boolean input fields in line with validation
+  enforced on upstream RPCs, where this is already the case. Requests must now use unquoted `true`
+  or `false`.
+
+  * The following RPCs are affected, `bls generate`, `bls fromsecret`, `coinjoinsalt generate`,
+    `coinjoinsalt set`, `masternode connect`, `protx diff`, `protx list`, `protx register`,
+    `protx register_legacy`, `protx register_evo`, `protx register_fund`, `protx register_fund_legacy`,
+    `protx register_fund_evo`, `protx revoke`, `protx update_registrar`, `protx update_registrar_legacy`,
+    `protx update_service`, `protx update_service_evo`, `quorum info`,  `quorum platformsign`,
+    `quorum rotationinfo`, `quorum sign`.
+
+  * This restriction can be relaxed by setting `-deprecatedrpc=permissive_bool` at runtime
+    but is liable to be removed in future versions of Dash Core.