Fix symfony 6.3 return type deprecations

Author: acrobat

src/DependencyInjection/Compiler/ValidateExtensionConfigurationPass.php

@@ -18,6 +18,8 @@ class ValidateExtensionConfigurationPass implements CompilerPassInterface
      * compiler pass.
      *
      * @param ContainerBuilder $container
+     *
+     * @return void
      */
     public function process(ContainerBuilder $container)
     {

src/DependencyInjection/StofDoctrineExtensionsExtension.php

@@ -14,6 +14,9 @@ class StofDoctrineExtensionsExtension extends Extension
     private $entityManagers   = array();
     private $documentManagers = array();
 
+    /**
+     * @return void
+     */
     public function load(array $configs, ContainerBuilder $container)
     {
         $processor = new Processor();

src/StofDoctrineExtensionsBundle.php

@@ -10,6 +10,8 @@ class StofDoctrineExtensionsBundle extends Bundle
 {
     /**
      * {@inheritdoc}
+     *
+     * @return void
      */
     public function build(ContainerBuilder $container)
     {