Issue #2906665: Follow-up: Use correct namespace for tests

modules/facets_summary/tests/src/Unit/Plugin/Processor/HideWhenNotRenderedProcessorTest.php

 <?php
 
-namespace Drupal\Tests\facets_summary\Unit\Plugin\Processors;
+namespace Drupal\Tests\facets_summary\Unit\Plugin\Processor;
 
 use Drupal\Core\DependencyInjection\ContainerBuilder;
 use Drupal\facets\FacetSource\FacetSourcePluginInterface;

modules/facets_summary/tests/src/Unit/Plugin/Processor/ResetFacetsProcessorTest.php

 <?php
 
-namespace Drupal\Tests\facets_summary\Unit\Plugin\Processors;
+namespace Drupal\Tests\facets_summary\Unit\Plugin\Processor;
 
 use Drupal\Core\DependencyInjection\ContainerBuilder;
 use Drupal\Core\StringTranslation\TranslationInterface;

modules/facets_summary/tests/src/Unit/Plugin/Processor/ShowTextWhenEmptyProcessorTest.php

 <?php
 
-namespace Drupal\Tests\facets_summary\Unit\Plugin\Processors;
+namespace Drupal\Tests\facets_summary\Unit\Plugin\Processor;
 
 use Drupal\Core\DependencyInjection\ContainerBuilder;
 use Drupal\Core\StringTranslation\TranslationInterface;