Merge pull request #604 from justinsb/bump_to_go_1_20_8

Bump go to 1.20.8

Author: k8s-ci-robot

WORKSPACE

@@ -47,7 +47,7 @@ go_rules_dependencies()
 
 go_download_sdk(
     name = "go_sdk",
-    version = "1.20.7",
+    version = "1.20.8",
 )
 
 go_register_toolchains()