Update Symfony/Monolog PSR3 information (#11063)

Author: HypeMC

docs/platforms/php/guides/symfony/index.mdx

@@ -49,15 +49,7 @@ monolog:
             level: !php/const Monolog\Logger::ERROR
             hub_id: Sentry\State\HubInterface
             fill_extra_context: true # Enables sending monolog context to Sentry
-```
-
-Additionally, you can register the `PsrLogMessageProcessor` to resolve PSR-3 placeholders in reported messages:
-
-{/* <!-- prettier-ignore --> */}
-```yaml {filename:config/packages/sentry.yaml}
-services:
-    Monolog\Processor\PsrLogMessageProcessor:
-        tags: { name: monolog.processor, handler: sentry }
+            process_psr_3_messages: false # Disables the resolution of PSR-3 placeholders in reported messages
 ```
 
 ## Verify