Upgrade rust/crates/crossbeam-epoch to 0.9.4
Test: make
Change-Id: Ib2bff9fb19c1fba16b132fa6e133b18683047ab6
diff --git a/README.md b/README.md
index c8ebd87..eb33bad 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@
https://docs.rs/crossbeam-epoch)
[](
https://www.rust-lang.org)
-[](https://discord.gg/BBYwKq)
+[](https://discord.com/invite/JXYwgWZ)
This crate provides epoch-based garbage collection for building concurrent data structures.