fix(index.d.ts): rename map() -> transform() to line up with chan…

…ge in v6.0

Fix #11161

index.d.ts

@@ -2337,7 +2337,7 @@ declare module 'mongoose' {
      * Runs a function `fn` and treats the return value of `fn` as the new value
      * for the query to resolve to.
      */
-    map<MappedType>(fn: (doc: ResultType) => MappedType): QueryWithHelpers<MappedType, DocType, THelpers, RawDocType>;
+    transform<MappedType>(fn: (doc: ResultType) => MappedType): QueryWithHelpers<MappedType, DocType, THelpers, RawDocType>;
 
     /** Specifies an `$maxDistance` query condition. When called with one argument, the most recent path passed to `where()` is used. */
     maxDistance(val: number): this;