bump gossamer commit

diff --git a/gossamer b/gossamer
index af5471610a6da4df3c50ddb2a578b802536c60f6..3f51d18c4ae215ca5021322c2b7f095fb07702c5 160000 (submodule)
--- a/gossamer
+++ b/gossamer
@@ -1 +1 @@
-Subproject commit af5471610a6da4df3c50ddb2a578b802536c60f6
+Subproject commit 3f51d18c4ae215ca5021322c2b7f095fb07702c5