docs: update docs deps to latest versions

MODULE.bazel

@@ -62,6 +62,16 @@ docs_pip = use_extension(
     dev_dependency = True,
 )
 docs_pip.parse(
+    experimental_requirement_cycles = {
+        "sphinx": [
+            "sphinx",
+            "sphinxcontrib-serializinghtml",
+            "sphinxcontrib-qthelp",
+            "sphinxcontrib-htmlhelp",
+            "sphinxcontrib-devhelp",
+            "sphinxcontrib-applehelp",
+        ],
+    },
     hub_name = "docs_deps",
     python_version = "3.11",
     requirements_darwin = "//docs/sphinx:requirements_darwin.txt",

WORKSPACE

@@ -110,6 +110,16 @@ install_deps()
 
 pip_parse(
     name = "docs_deps",
+    experimental_requirement_cycles = {
+        "sphinx": [
+            "sphinx",
+            "sphinxcontrib-serializinghtml",
+            "sphinxcontrib-qthelp",
+            "sphinxcontrib-htmlhelp",
+            "sphinxcontrib-devhelp",
+            "sphinxcontrib-applehelp",
+        ],
+    },
     incompatible_generate_aliases = True,
     python_interpreter_target = interpreter,
     requirements_darwin = "//docs/sphinx:requirements_darwin.txt",

docs/sphinx/BUILD.bazel

@@ -18,9 +18,12 @@ load("//sphinxdocs:readthedocs.bzl", "readthedocs_install")
 load("//sphinxdocs:sphinx.bzl", "sphinx_build_binary", "sphinx_docs", "sphinx_inventory")
 load("//sphinxdocs:sphinx_stardoc.bzl", "sphinx_stardocs")
 
-# We only build for Linux and Mac because the actual doc process only runs
-# on Linux. Mac is close enough. Making CI happy under Windows is too much
-# of a headache, though, so we don't bother with that.
+# We only build for Linux and Mac because:
+# 1. The actual doc process only runs on Linux
+# 2. Mac is a common development platform, and is close enough to Linux
+#    it's feasible to make work.
+# Making CI happy under Windows is too much of a headache, though, so we don't
+# bother with that.
 _TARGET_COMPATIBLE_WITH = select({
     "@platforms//os:linux": [],
     "@platforms//os:macos": [],