minor #43299 Fix "can not" spelling (mvorisek)

This PR was squashed before being merged into the 5.4 branch.

Discussion
----------

Fix "can not" spelling

| Q             | A
| ------------- | ---
| Branch?       | 5.4
| Bug fix?      | no
| New feature?  | no
| Deprecations? | no
| Tickets       |
| License       | MIT
| Doc PR        |

Commits
-------

28a438eed4 Fix "can not" spelling

Author: nicolas-grekas

HttpClientTrait.php

@@ -48,7 +48,7 @@ private static function prepareRequest(?string $method, ?string $url, array $opt
                 throw new InvalidArgumentException(sprintf('Invalid HTTP method "%s", only uppercase letters are accepted.', $method));
             }
             if (!$method) {
-                throw new InvalidArgumentException('The HTTP method can not be empty.');
+                throw new InvalidArgumentException('The HTTP method cannot be empty.');
             }
         }
 

NoPrivateNetworkHttpClient.php

@@ -58,7 +58,7 @@ public function __construct(HttpClientInterface $client, $subnets = null)
         }
 
         if (!class_exists(IpUtils::class)) {
-            throw new \LogicException(sprintf('You can not use "%s" if the HttpFoundation component is not installed. Try running "composer require symfony/http-foundation".', __CLASS__));
+            throw new \LogicException(sprintf('You cannot use "%s" if the HttpFoundation component is not installed. Try running "composer require symfony/http-foundation".', __CLASS__));
         }
 
         $this->client = $client;