Fix invalid font color for 404 w/ dark theme (#3579)

Co-authored-by: Roman Zabaluev <rzabaluev@provectus.com>

kafka-ui-react-app/src/components/ErrorPage/ErrorPage.styled.ts

@@ -17,4 +17,5 @@ export const Number = styled.div`
 
 export const Text = styled.div`
   font-size: 20px;
+  color: ${({ theme }) => theme.default.color.normal};
 `;