roll: pigweed pw_build: Move constraint/cortex-m to constraints/cortex_m

This CL moves a recently added directory to a similarly named, existing
directory. It also removes a hyphen from the package name, as that is
disallowed in google3.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/237332
Original-Revision: f8480246f4c8a5dd485ed19498bcd15b1d3cc3e0

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: 34ca6b703bafc0..f8480246f4c8a5
Roller-URL: https://ci.chromium.org/b/8735988121684385057
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I0b05486af0541349aebe12cf7aef3329a59742c0
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/quickstart/bazel/+/237373
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
diff --git a/MODULE.bazel b/MODULE.bazel
index dec4c3f..8427ae9 100644
--- a/MODULE.bazel
+++ b/MODULE.bazel
@@ -49,8 +49,8 @@
     module_name = "pigweed",
     # ROLL: Warning: this entry is automatically updated.
     # ROLL: Last updated 2024-09-23.
-    # ROLL: By https://cr-buildbucket.appspot.com/build/8735989551693025921.
-    commit = "34ca6b703bafc01d563a3b8e71eea9447d88fc27",
+    # ROLL: By https://cr-buildbucket.appspot.com/build/8735988121684385057.
+    commit = "f8480246f4c8a5dd485ed19498bcd15b1d3cc3e0",
     remote = "https://pigweed.googlesource.com/pigweed/pigweed",
 )
 
@@ -58,8 +58,8 @@
     module_name = "pw_toolchain",
     # ROLL: Warning: this entry is automatically updated.
     # ROLL: Last updated 2024-09-23.
-    # ROLL: By https://cr-buildbucket.appspot.com/build/8735989551693025921.
-    commit = "34ca6b703bafc01d563a3b8e71eea9447d88fc27",
+    # ROLL: By https://cr-buildbucket.appspot.com/build/8735988121684385057.
+    commit = "f8480246f4c8a5dd485ed19498bcd15b1d3cc3e0",
     remote = "https://pigweed.googlesource.com/pigweed/pigweed",
     strip_prefix = "pw_toolchain_bazel",
 )