Update rules_python to 0.28.0 (#250)

for WORKSPACE dependencies. MODULE.bazel already uses this version.
diff --git a/fuzzing/repositories.bzl b/fuzzing/repositories.bzl
index ef776c2..e290e64 100644
--- a/fuzzing/repositories.bzl
+++ b/fuzzing/repositories.bzl
@@ -39,9 +39,9 @@
     maybe(
         http_archive,
         name = "rules_python",
-        sha256 = "9d04041ac92a0985e344235f5d946f71ac543f1b1565f2cdbc9a2aaee8adf55b",
-        strip_prefix = "rules_python-0.26.0",
-        url = "https://github.com/bazelbuild/rules_python/releases/download/0.26.0/rules_python-0.26.0.tar.gz",
+        sha256 = "d70cd72a7a4880f0000a6346253414825c19cdd40a28289bdf67b8e6480edff8",
+        strip_prefix = "rules_python-0.28.0",
+        url = "https://github.com/bazelbuild/rules_python/releases/download/0.28.0/rules_python-0.28.0.tar.gz",
     )
     maybe(
         http_archive,