Update return type for getIcon method to nullable string

Author: CodeWithDennis

src/Components/Concerns/HasIcon.php

@@ -25,7 +25,7 @@ public function getIconAnimation(): ?string
         return $this->evaluate($this->iconAnimation)?->value ?? null;
     }
 
-    public function getIcon(): string
+    public function getIcon(): ?string
     {
         return $this->evaluate($this->icon);
     }