LibHTML: Draw image alt text as black rather than white

Author: https://github.com/deoxxa
Commit: https://github.com/SerenityOS/serenity/commit/088237a25fe
Pull-request: https://github.com/SerenityOS/serenity/pull/634

Libraries/LibHTML/Layout/LayoutImage.cpp

@@ -37,7 +37,7 @@ void LayoutImage::render(RenderingContext& context)
         auto alt = node().alt();
         if (alt.is_empty())
             alt = node().src();
-        context.painter().draw_text(rect(), alt, TextAlignment::Center, Color::White);
+        context.painter().draw_text(rect(), alt, TextAlignment::Center, Color::Black);
     } else {
         context.painter().draw_scaled_bitmap(rect(), *node().bitmap(), node().bitmap()->rect());
     }