chore: update location of toolchain type, accounting for rules_python breaking change

Author: alexeagle

examples/BUILD.bazel

@@ -1,6 +1,6 @@
 load("@rules_go//proto:def.bzl", "go_proto_library")
 load("@rules_proto//proto:defs.bzl", "proto_library")
-load("@rules_python//python:proto.bzl", "py_proto_library")
+load("@protobuf//bazel:py_proto_library.bzl", "py_proto_library")
 
 package(default_visibility = ["//visibility:public"])
 

examples/MODULE.bazel

@@ -2,6 +2,7 @@ bazel_dep(name = "toolchains_protoc", version = "0.0.0")
 bazel_dep(name = "aspect_bazel_lib", version = "2.11.0")
 bazel_dep(name = "aspect_rules_py", version = "1.3.2")
 bazel_dep(name = "platforms", version = "0.0.11")
+bazel_dep(name = "protobuf", version = "29.3")
 bazel_dep(name = "rules_java", version = "8.6.3")
 bazel_dep(name = "rules_proto", version = "7.1.0")
 bazel_dep(name = "rules_python", version = "1.2.0-rc0")

examples/tools/toolchains/BUILD.bazel

@@ -15,7 +15,9 @@ proto_lang_toolchain(
     command_line = "--python_out=%s",
     progress_message = "Generating Python proto_library %{label}",
     runtime = "@pypi//protobuf",
-    toolchain_type = "@rules_python//python/proto:toolchain_type",
+    # NB: this was moved from rules_python in
+    # https://github.com/protocolbuffers/protobuf/commit/3c3d4900bc5e6270aec832f64c87d9cdfe57befb
+    toolchain_type = "@protobuf//bazel/private:python_toolchain_type",
 )
 
 # Same as above, but for Java