build: Update Bazel version to 6.0.0 in .bazeliskrc (#1610)

diff --git a/.bazeliskrc b/.bazeliskrc
index c7ac93c..04cd2fe 100644
--- a/.bazeliskrc
+++ b/.bazeliskrc
@@ -1,2 +1,2 @@
 # See https://github.com/bazelbuild/bazelisk
-USE_BAZEL_VERSION=5.2.0
+USE_BAZEL_VERSION=6.0.0