Update Bazel version to 6.4.0 (#1085)

Author: Bencodes

.bazelci/presubmit.yml

@@ -1,8 +1,8 @@
 ---
 validate_config: 1
-bazel: 6.3.2
+bazel: 6.4.0
 buildifier:
-  version: 6.3.3
+  version: 6.4.0
   # no lint warnings for the moment. They are basically a smoke alarm in hell.
   # keep this argument in sync with .pre-commit-config.yaml
   warnings: "-confusing-name,-constant-glob,-duplicated-name,-function-docstring,-function-docstring-args,-function-docstring-header,-module-docstring,-name-conventions,-no-effect,-constant-glob,-provider-params,-print,-rule-impl-return,-bzl-visibility,-unnamed-macro,-uninitialized,-unreachable"

.bazelversion

@@ -1 +1 @@
-6.3.2
+6.4.0