roll: pigweed pw_env_setup: Upgrade to Sphinx v7.4.7

We need v7.4.7 (the last v7 release) to use the new Sphinx
features that were introduced in rules_python v0.36.0. These
features will be the foundation of our Bazel-based docs build
system. The new rules_python features introduced in v0.36.0
don't work with the version of Sphinx that we're currently
on (v7.1.2).

Original-Bug: 318892911
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/238553
Presubmit-Verified: CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com>
Original-Revision: 9a5296672be32b32d684e5250b0c688ceb9206ea

Rolled-Repo: https://pigweed.googlesource.com/pigweed/pigweed
Rolled-Commits: 53b16cd8d29078..9a5296672be32b
Roller-URL: https://ci.chromium.org/b/8735089144639726769
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: Ieff1e7e6d0e29d9fe286a6eee19e00f93efd972e
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/quickstart/bazel/+/239772
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Lint: Lint 🤖 <android-build-ayeaye@system.gserviceaccount.com>
diff --git a/MODULE.bazel b/MODULE.bazel
index dd99e51..c5bdbb9 100644
--- a/MODULE.bazel
+++ b/MODULE.bazel
@@ -48,18 +48,18 @@
 git_override(
     module_name = "pigweed",
     # ROLL: Warning: this entry is automatically updated.
-    # ROLL: Last updated 2024-10-02.
-    # ROLL: By https://cr-buildbucket.appspot.com/build/8735151260283828785.
-    commit = "53b16cd8d2907855b13bec9159286927de602a72",
+    # ROLL: Last updated 2024-10-03.
+    # ROLL: By https://cr-buildbucket.appspot.com/build/8735089144639726769.
+    commit = "9a5296672be32b32d684e5250b0c688ceb9206ea",
     remote = "https://pigweed.googlesource.com/pigweed/pigweed",
 )
 
 git_override(
     module_name = "pw_toolchain",
     # ROLL: Warning: this entry is automatically updated.
-    # ROLL: Last updated 2024-10-02.
-    # ROLL: By https://cr-buildbucket.appspot.com/build/8735151260283828785.
-    commit = "53b16cd8d2907855b13bec9159286927de602a72",
+    # ROLL: Last updated 2024-10-03.
+    # ROLL: By https://cr-buildbucket.appspot.com/build/8735089144639726769.
+    commit = "9a5296672be32b32d684e5250b0c688ceb9206ea",
     remote = "https://pigweed.googlesource.com/pigweed/pigweed",
     strip_prefix = "pw_toolchain_bazel",
 )