update version of SpecUtils used

wcjohns · wcjohns · commit 76d0773d94a0 · 2021-02-19T10:12:00.000-08:00
diff --git a/external_libs/SpecUtils b/external_libs/SpecUtils
@@ -1 +1 @@
-Subproject commit 1d1b92ea5b6518d5be3d94f1f778bef173eab2c5
+Subproject commit 2326bce55e71132324677c0c0ad85339f1693d7a
