minor #34230 [HttpKernel][DataCollectorInterface] Ease compatibility …

…(fancyweb)

This PR was submitted for the 3.4 branch but it was merged into the 4.3 branch instead.

Discussion
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[HttpKernel][DataCollectorInterface] Ease compatibility

| Q             | A
| ------------- | ---
| Branch?       | 4.3
| Bug fix?      | no
| New feature?  | no
| Deprecations? | no
| Tickets       | https://github.com/symfony/symfony/pull/33065/files#r342109866
| License       | MIT
| Doc PR        | -

To ease data collectors being compatible from 4.3 to 5.0.

Commits
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761df46 [HttpKernel][DataCollectorInterface] Ease compatibility

src/Symfony/Component/HttpKernel/DataCollector/DataCollectorInterface.php

@@ -24,8 +24,10 @@ interface DataCollectorInterface extends ResetInterface
 {
     /**
      * Collects data for the given Request and Response.
+     *
+     * @param \Throwable|null $exception
      */
-    public function collect(Request $request, Response $response, \Exception $exception = null);
+    public function collect(Request $request, Response $response/*, \Throwable $exception = null*/);
 
     /**
      * Returns the name of the collector.