Update Icepack to #23b6c1272b50d42ca, Aug 30, 2023 (#857)

apcraig · web-flow · commit 32dc48eae101 · 2023-08-31T13:05:54.000-07:00
Includes thin ice enthalpy fix, not bit-for-bit.
diff --git a/icepack b/icepack
@@ -1 +1 @@
-Subproject commit f5e093f5148554674079d5c7fc0702a41b81f744
+Subproject commit 23b6c1272b50d42cad7928ffe0005d6ee673dee9
