Apply Rector changes (CI)

Author: xepozz

src/Renderer/HtmlRenderer.php

@@ -108,7 +108,7 @@ final class HtmlRenderer implements ThrowableRendererInterface
      */
     private ?array $vendorPaths = null;
 
-    private SolutionGenerator $solutionGenerator;
+    private readonly SolutionGenerator $solutionGenerator;
 
     /**
      * @param array $settings (deprecated) Settings can have the following keys:

src/Solution/SolutionGenerator.php

@@ -10,7 +10,7 @@ public function __construct(
         /**
          * @var SolutionGeneratorInterface[]
          */
-        private array $generators,
+        private readonly array $generators,
     ) {
     }