add information about new errors for revoke commands in the additions/removals section

Author: HannesSandberg

modules/ROOT/pages/deprecations-additions-removals-compatibility.adoc

@@ -152,6 +152,17 @@ Several  xref:clauses/transaction-clauses.adoc#query-listing-transactions[`SHOW
 * `startTime` and `currentQueryStartTime` now return a `ZONED DATETIME` instead of a `STRING` representation of a temporal value.
 * `clientAddress` and `outerTransactionId` now return `null` instead of an empty `STRING` when unavailable.
 * The current query-related columns — `currentQuery`, `currentQueryId`, `parameters`, `planner`, `runtime`, `indexes`, `currentQueryStartTime`, `currentQueryElapsedTime`, `currentQueryCpuTime`, `currentQueryIdleTime`, and `currentQueryStatus` — now return `null` when no query is executing.
+
+a|
+label:functionality[]
+label:updated[]
+[source, cypher, role="noheader"]
+----
+REVOKE READ {*} ON GRAPH * NODES A FROM regularUser
+REVOKE ROLE regularUser FROM bob
+----
+a|
+Notifications for impossible `REVOKE` commands, where a user, a role, or a database does not exist, have been replaced with errors.
 |===
 
 === New features