entropy: Use Unicode escape sequence in string

Signed-off-by: drkhsh <me@drkhsh.at>

components/entropy.c

@@ -22,7 +22,8 @@
 	const char *
 	entropy(const char *unused)
 	{
+		// https://www.unicode.org/charts/PDF/U2200.pdf
 		/* Unicode Character 'INFINITY' (U+221E) */
-		return "\xe2\x88\x9e";
+		return "\u221E";
 	}
 #endif