nit: fix error message in go_repository (#1750)

diff --git a/internal/go_repository.bzl b/internal/go_repository.bzl
index 8dac6eb..a3a4c6d 100644
--- a/internal/go_repository.bzl
+++ b/internal/go_repository.bzl
@@ -182,7 +182,7 @@
             "-sum=" + ctx.attr.sum,
         ]
     else:
-        fail("one of urls, commit, tag, or importpath must be specified")
+        fail("one of urls, commit, tag, or version must be specified")
 
     env = read_cache_env(ctx, go_env_cache)
     env_keys = [