Upgrade soy to 2020-08-24

Change-Id: I31f9b47a21050987f3b6bdb2854497d5d4d04852
diff --git a/WORKSPACE b/WORKSPACE
index 1874de0..f184c9d 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -126,8 +126,8 @@
 
 maven_jar(
     name = "soy",
-    artifact = "com.google.template:soy:2019-10-08",
-    sha1 = "4518bf8bac2dbbed684849bc209c39c4cb546237",
+    artifact = "com.google.template:soy:2020-08-24",
+    sha1 = "e774bf5cc95923d2685292883fe219e231346e50",
 )
 
 maven_jar(