Bump go bridge

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

diff --git a/wireguard-go b/wireguard-go
index 276bf973e8a086da7767dc25ebe116926c0b59db..a8326ae753975e73602958c1d7bbfe1174912ff9 160000 (submodule)
--- a/wireguard-go
+++ b/wireguard-go
@@ -1 +1 @@
-Subproject commit 276bf973e8a086da7767dc25ebe116926c0b59db
+Subproject commit a8326ae753975e73602958c1d7bbfe1174912ff9