bump gossamer commit

diff --git a/gossamer b/gossamer
index 6ff71e092189f4fba294ea0ffe11f9d2727750cf..c512088f2e7fb8ed6aace56202ff08408b252b44 160000 (submodule)
--- a/gossamer
+++ b/gossamer
@@ -1 +1 @@
-Subproject commit 6ff71e092189f4fba294ea0ffe11f9d2727750cf
+Subproject commit c512088f2e7fb8ed6aace56202ff08408b252b44