minor #34215 Fix typo (fabpot)

This PR was merged into the 4.4 branch.

Discussion
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Fix typo

| Q             | A
| ------------- | ---
| Branch?       | 4.4 <!-- see below -->
| Bug fix?      | yes
| New feature?  | no <!-- please update src/**/CHANGELOG.md files -->
| Deprecations? | no <!-- please update UPGRADE-*.md and src/**/CHANGELOG.md files -->
| Tickets       | n/a <!-- prefix each issue number with "Fix #", if any -->
| License       | MIT
| Doc PR        | n/a
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Commits
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327a13cac0 Fix typo

Author: fabpot

Test/MailerAssertionsTrait.php

@@ -40,7 +40,7 @@ public static function assertEmailIsNotQueued(MessageEvent $event, string $messa
         self::assertThat($event, new LogicalNot(new MailerConstraint\EmailIsQueued()), $message);
     }
 
-    public static function assertEmailAttachementCount(RawMessage $email, int $count, string $message = ''): void
+    public static function assertEmailAttachmentCount(RawMessage $email, int $count, string $message = ''): void
     {
         self::assertThat($email, new MimeConstraint\EmailAttachmentCount($count), $message);
     }

Tests/Functional/MailerTest.php

@@ -92,7 +92,7 @@ public function testMailerAssertions()
         $this->assertEmailTextBodyNotContains($email, 'Foo');
         $this->assertEmailHtmlBodyContains($email, 'Foo');
         $this->assertEmailHtmlBodyNotContains($email, 'Bar');
-        $this->assertEmailAttachementCount($email, 1);
+        $this->assertEmailAttachmentCount($email, 1);
 
         $email = $this->getMailerMessage($second);
         $this->assertEmailAddressContains($email, 'To', '[email protected]');