docs: update docs for the hooks

Author: yaroslav8765

adminforth/documentation/docs/tutorial/03-Customization/04-hooks.md

@@ -189,21 +189,29 @@ Let's limit it:
 ```ts title='./resources/apartments.ts'
 {
   ...
-  hooks: {
-    dropdownList: {
-      beforeDatasourceRequest: async ({ adminUser, query }: { adminUser: AdminUser, query: any }) => {
-        if (adminUser.dbUser.role !== "superadmin") {
-          query.filtersTools.replaceOrAddTopFilter(Filters.EQ("id", adminUser.dbUser.id));
-        };
-        return {
-          "ok": true,
-        };
-      }
+
+  foreignResource: { 
+    
+    ...
+
+    hooks: {
+      dropdownList: {
+        beforeDatasourceRequest: async ({ adminUser, query }: { adminUser: AdminUser, query: any }) => {
+          if (adminUser.dbUser.role !== "superadmin") {
+            query.filtersTools.replaceOrAddTopFilter(Filters.EQ("id", adminUser.dbUser.id));
+          };
+          return {
+            "ok": true,
+          };
+        }
+      },
     },
-  },
+  }
 }
 ```
 
+> ☝️☝️☝️ This hooks should be written only inside column. If you'll add it in resource hooks - it won't work
+
 In our case we limit the dropdown list to show only the current user, however you can use same sample to list only objects who are related to the current user in case if you will have relation configurations which require to show related objects which belongs to the current user.
 
 Flow diagram for dropdown list: