Update pybind11_abseil/WORKSPACE

Current motivation: Testing after https://github.com/pybind/pybind11_bazel/pull/46 was merged.

Convert pybind11_bazel dependency to FLOATING (we own it).

PiperOrigin-RevId: 485626325

WORKSPACE

-
 workspace(name = "com_google_pybind11_abseil")
 load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
 
-# To update a dependency to a new revision,
+# To update a PINNED dependency to a new revision,
 # a) update URL and strip_prefix to the new git commit hash
 # b) get the sha256 hash of the commit by running:
 #    curl -L https://github.com/<...>.tar.gz | sha256sum
 #    and update the sha256 with the result.
 
+## `abseil-cpp` (PINNED)
+# https://github.com/abseil/abseil-cpp
 http_archive(
     name = "com_google_absl",
     sha256 = "dcf71b9cba8dc0ca9940c4b316a0c796be8fab42b070bb6b7cab62b48f0e66c4",  # SHARED_ABSL_SHA
@@ -17,21 +18,22 @@ http_archive(
     ],
 )
 
-## `pybind11_bazel`
-# See https://github.com/pybind/pybind11_bazel
+## `pybind11_bazel` (FLOATING)
+# https://github.com/pybind/pybind11_bazel
 http_archive(
   name = "pybind11_bazel",
-  strip_prefix = "pybind11_bazel-9a24c33cbdc510fa60ab7f5ffb7d80ab89272799",
-  sha256 = "32feba648e364da83b0876713cca8a7113f58433cee0680591218dbc202f1392",
-  urls = ["https://github.com/pybind/pybind11_bazel/archive/9a24c33cbdc510fa60ab7f5ffb7d80ab89272799.tar.gz"],
+  strip_prefix = "pybind11_bazel-master",
+  urls = ["https://github.com/pybind/pybind11_bazel/archive/refs/heads/master.tar.gz"],
 )
 
-# We still require the pybind library.
+## `pybind11` (FLOATING)
+# https://github.com/pybind/pybind11
 http_archive(
   name = "pybind11",
   build_file = "@pybind11_bazel//:pybind11.BUILD",
   strip_prefix = "pybind11-master",
   urls = ["https://github.com/pybind/pybind11/archive/refs/heads/master.tar.gz"],
 )
+
 load("@pybind11_bazel//:python_configure.bzl", "python_configure")
 python_configure(name = "local_config_python")