feat: use resolveBackground function for FeaturesGrid background property.

Author: ciro-maciel

src/components/FeaturesGrid.jsx

@@ -246,7 +246,7 @@ function FeatureCard({
                 h="100%"
                 p={{ base: 'xl', md: 40 }}
                 radius="0"
-                bg={bg}
+                bg={resolveBackground(background)}
                 bd="1px solid var(--mantine-color-gray-2)"
                 display="flex"
                 style={{