fix(NODE-6690): Remove extraneous Document in replaceOne return type (#4383)

Co-authored-by: Aditi Khare <106987683+aditi-khare-mongoDB@users.noreply.github.com>

Author: arturmuller

src/collection.ts

@@ -389,7 +389,7 @@ export class Collection<TSchema extends Document = Document> {
     filter: Filter<TSchema>,
     replacement: WithoutId<TSchema>,
     options?: ReplaceOptions
-  ): Promise<UpdateResult<TSchema> | Document> {
+  ): Promise<UpdateResult<TSchema>> {
     return await executeOperation(
       this.client,
       new ReplaceOneOperation(