Update to last poseidon-rs version

Update to last Poseidon version (which includes the changes of the reference implementation from
26ddaa91db)

Compatible with update at circomlib
(cf853c1cc9)

src/lib.rs

@@ -738,7 +738,7 @@ mod tests {
         );
         assert_eq!(
             sig.s.to_string(),
-            "1398758333392199195742243841591064350253744445503462896781493968760929513778"
+            "1672775540645840396591609181675628451599263765380031905495115170613215233181"
         );
         let v = verify(pk, sig, msg);
         assert_eq!(v, true);