update demes-spec submodule

molpopgen · molpopgen · commit 489a0b68f63c · 2026-03-25T14:32:00.000-07:00
diff --git a/demes-spec b/demes-spec
@@ -1 +1 @@
-Subproject commit 0f5fa522fd9c79eb01f37931574a703305ac8add
+Subproject commit ea38d43c618c367a7e09c714ed88ae4a5eb5bd62
