[roll pigweed] third_party/rules_proto_grpc: Fixes include bug

Fixes an include that manifests when you point the protobuf compiler at
a target proto_library that does not have an import_prefix attribute.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/91047

https://pigweed.googlesource.com/pigweed/pigweed
pigweed Rolled-Commits: ac3ca982d7f86f4..abe1ca33ea3eae1
Roller-URL: https://ci.chromium.org/b/8810001996774960545
Cq-Cl-Tag: roller-builder:pigweed-zephyr-roller
Cq-Cl-Tag: roller-bid:8810001996774960545
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I55dba413f246e81cada9e76cef1a8839731fff76
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/zephyr-integration/+/100404
Bot-Commit: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
Commit-Queue: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
diff --git a/pigweed b/pigweed
index ac3ca98..abe1ca3 160000
--- a/pigweed
+++ b/pigweed
@@ -1 +1 @@
-Subproject commit ac3ca982d7f86f4d6e18b81f4ee67d85918cf90f
+Subproject commit abe1ca33ea3eae14a26a0ba7c95f13316b874062