Merge pull request #10621 from tpudlik/pw_extension

Add reserved extension number for Pigweed

docs/options.md

diff --git a/docs/options.md b/docs/options.md
index dc19688..87f7dca 100644
--- a/docs/options.md
+++ b/docs/options.md
@@ -344,3 +344,7 @@
 1. mypy-protobuf
    * Website: https://github.com/nipunn1313/mypy-protobuf
    * Extension: 1151-1154
+
+1. Pigweed protobuf compiler
+   * Website: https://pigweed.dev/pw_protobuf
+   * Extension: 1155