Update boringssl digest to 9a836f7

Author: renovate-bot

bazel/zetasql_deps_step_2.bzl

@@ -218,10 +218,10 @@ py_library(
                 name = "boringssl",
                 # Commit from 2021-11-01
                 urls = [
-                    "https://github.com/google/boringssl/archive/4fb158925f7753d80fb858cb0239dff893ef9f15.tar.gz",
+                    "https://github.com/google/boringssl/archive/9a836f7840b965e66085f8380116a54076f44a4b.tar.gz",
                 ],
-                sha256 = "e168777eb0fc14ea5a65749a2f53c095935a6ea65f38899a289808fb0c221dc4",
-                strip_prefix = "boringssl-4fb158925f7753d80fb858cb0239dff893ef9f15",
+                sha256 = "b3f4c0fdcdf585c769b552e5e757b1acbbc64ccddcefe4c736ea24242c2ea169",
+                strip_prefix = "boringssl-9a836f7840b965e66085f8380116a54076f44a4b",
             )
 
         # Farmhash