minor symfony#60182 [VarDumper] fix tests (xabbuh)

This PR was merged into the 6.4 branch.

Discussion
----------

[VarDumper] fix tests

| Q             | A
| ------------- | ---
| Branch?       | 6.4
| Bug fix?      | no
| New feature?  | no
| Deprecations? | no
| Issues        |
| License       | MIT

Commits
-------

4d8d6ca fix tests

Author: nicolas-grekas

src/Symfony/Component/VarDumper/Tests/Caster/RdKafkaCasterTest.php

@@ -61,6 +61,7 @@ public function testDumpConf()
   client.id: "rdkafka"
 %A
   dr_msg_cb: "0x%x"
+%A
 }
 EODUMP;
 
@@ -114,7 +115,7 @@ public function testDumpTopicConf()
         $expectedDump = <<<EODUMP
 RdKafka\TopicConf {
   request.required.acks: "%i"
-  request.timeout.ms: "5000"
+  request.timeout.ms: "%d"
   message.timeout.ms: "300000"
 %A
   auto.commit.enable: "true"