chore: bump rules_go to 0.28.0 (#10)

WORKSPACE

diff --git a/WORKSPACE b/WORKSPACE
index bcf7812..4d2f257 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -4,10 +4,10 @@
 
 http_archive(
     name = "io_bazel_rules_go",
-    sha256 = "69de5c704a05ff37862f7e0f5534d4f479418afc21806c887db544a316f3cb6b",
+    sha256 = "8e968b5fcea1d2d64071872b12737bbb5514524ee5f0a4f54f5920266c261acb",
     urls = [
-        "https://mirror.bazel.build/github.com/bazelbuild/rules_go/releases/download/v0.27.0/rules_go-v0.27.0.tar.gz",
-        "https://github.com/bazelbuild/rules_go/releases/download/v0.27.0/rules_go-v0.27.0.tar.gz",
+        "https://mirror.bazel.build/github.com/bazelbuild/rules_go/releases/download/v0.28.0/rules_go-v0.28.0.zip",
+        "https://github.com/bazelbuild/rules_go/releases/download/v0.28.0/rules_go-v0.28.0.zip",
     ],
 )