ci: test with Bazel 6.0 and 6.4

Author: zegl

.github/workflows/bazelisk.yml

@@ -10,6 +10,5 @@ jobs:
     steps:
     - uses: actions/checkout@v3
     - uses: bazelbuild/setup-bazelisk@v2
-    - run: USE_BAZEL_VERSION=5.2.0 bazel test //...
-    - run: USE_BAZEL_VERSION=4.2.2 bazel test //...
-    - run: USE_BAZEL_VERSION=3.7.2 bazel test //...
+    - run: USE_BAZEL_VERSION=6.0.0 bazel test //...
+    - run: USE_BAZEL_VERSION=6.4.0 bazel test //...