maxima: revision bump (sbcl 2.5.3)

Signed-off-by: Rui Chen <[email protected]>

Author: chenrui333

Formula/m/maxima.rb

@@ -4,7 +4,7 @@ class Maxima < Formula
   url "https://downloads.sourceforge.net/project/maxima/Maxima-source/5.47.0-source/maxima-5.47.0.tar.gz"
   sha256 "9104021b24fd53e8c03a983509cb42e937a925e8c0c85c335d7709a14fd40f7a"
   license "GPL-2.0-only"
-  revision 19
+  revision 20
 
   livecheck do
     url :stable