Fixed upgrade guide spelling

docs/en/04_Changelogs/4.0.0.md

@@ -275,7 +275,7 @@ After:
 
     :::php
     public function httpSubmission($data, $form, $request) {
-        $requset->getSession()->set('loggedIn', null);
+        $request->getSession()->set('loggedIn', null);
     }
 
 
@@ -1382,11 +1382,10 @@ After (`mysite/_config/config.yml`):
 
 * Removed `ConfigureFromEnv.php` as it's no longer necessary.
 * `Session` object has had significant refactoring. This object no longer is accessed via
-  Session::inst(), but instead should be queried from the current request via `$request->getSession()`.
+  `Session::inst()`, but instead should be queried from the current request via `$request->getSession()`.
   All static methods have been removed, and the `inst_` prefix removed from all instance members.
   Please see the upgrading section on Session object for more details.
-* Request handling has changed slightly. `Director.rules` confing no longer support
- `redirect:<url>` directly via config.
+* `Director.rules` config no longer support `redirect:<url>` directly via config.
 * `Director::get_environment_type()` and `Director::set_environment_type()` are removed.
   Get the `Kernel` instance via injector and query `getEnvironment()` instead.
   E.g. `$type = Injector::inst()->get(Kernel::class)->getEnvironment();`.