bug #32210 [Mailer] Fix timeout type hint (fabpot)

This PR was merged into the 4.3 branch.

Discussion
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[Mailer] Fix timeout type hint

| Q             | A
| ------------- | ---
| Branch?       | 4.3
| Bug fix?      | yes
| New feature?  | no <!-- please update src/**/CHANGELOG.md files -->
| BC breaks?    | no     <!-- see https://symfony.com/bc -->
| Deprecations? | no <!-- please update UPGRADE-*.md and src/**/CHANGELOG.md files -->
| Tests pass?   | yes    <!-- please add some, will be required by reviewers -->
| Fixed tickets | n/a
| License       | MIT
| Doc PR        | n/a

The timeout on a socket is a float, not an integer.

Commits
-------

0e7ed9e [Mailer] fixed timeout type hint

src/Symfony/Component/Mailer/Transport/Smtp/Stream/SocketStream.php

@@ -34,14 +34,14 @@ final class SocketStream extends AbstractStream
     private $sourceIp;
     private $streamContextOptions = [];
 
-    public function setTimeout(int $timeout): self
+    public function setTimeout(float $timeout): self
     {
         $this->timeout = $timeout;
 
         return $this;
     }
 
-    public function getTimeout(): int
+    public function getTimeout(): float
     {
         return $this->timeout;
     }