Release 0.28.0 (#2167)

diff --git a/version.bzl b/version.bzl
index 63d30dc..2078a98 100644
--- a/version.bzl
+++ b/version.bzl
@@ -1,3 +1,3 @@
 """The version of rules_rust."""
 
-VERSION = "0.27.0"
+VERSION = "0.28.0"