Add Shallow, Optional configs

[bennn]

Move typed to deep too?

diff --git a/scribblings/gtp-checkup.scrbl b/scribblings/gtp-checkup.scrbl
index 332beb4..baab69e 100644
--- a/scribblings/gtp-checkup.scrbl
+++ b/scribblings/gtp-checkup.scrbl
@@ -48,7 +48,10 @@ Run @exec{racket main.rkt --help} for more information.
       @elem{(@emph{March 2023})
             Updated benchmark code to match GTP Benchmarks v9.0.
             Disabled Typed Racket optimizations for code and contracts
-            in the worst-case (TWC) configuration.}]}
+            in the worst-case (TWC) configuration.
+            Moved the @tt{typed} and @tt{typed-worst-case} configurations
+            to @tt{deep} and @tt{deep-worst-case}.
+            Added @tt{shallow} and @tt{shallow-worst-case} to test Shallow Typed Racket.}]}