[roll third_party/pigweed] targets/rp2040: Remove extra .elf extension

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/110634

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 5bc399c5a61f183..830f088c6d8c059
Roller-URL: https://ci.chromium.org/b/8802825608191843457
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I2dc96265cdaa13b7e0758f1eed0c097a68bc9aac
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/110715
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/third_party/pigweed b/third_party/pigweed
index 5bc399c..830f088 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 5bc399c5a61f1830902786bdc549c4d5d878df05
+Subproject commit 830f088c6d8c05999acbbaa9f8b3cc6e8c2bbbff