fixup! chore: use rules_shell in multi_python_versions example

Author: aignas

examples/multi_python_versions/WORKSPACE

@@ -47,6 +47,8 @@ load("@pypi//:requirements.bzl", "install_deps")
 install_deps()
 
 # See https://github.com/bazelbuild/rules_shell/releases/tag/v0.1.1
+load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
+
 http_archive(
     name = "rules_shell",
     sha256 = "0d0c56d01c3c40420bf7bf14d73113f8a92fbd9f5cd13205a3b89f72078f0321",