Fully switch to bazel 6.0.0 in all places (#960)

examples/BUILD.bazel

diff --git a/examples/BUILD.bazel b/examples/BUILD.bazel
index 4f99e2b..e0a7e5a 100644
--- a/examples/BUILD.bazel
+++ b/examples/BUILD.bazel
@@ -51,5 +51,5 @@
 bazel_integration_test(
     name = "bzlmod_example",
     bzlmod = True,
-    override_bazel_version = "6.0.0rc1",
+    override_bazel_version = "6.0.0",
 )

examples/bzlmod/.bazelversion

diff --git a/examples/bzlmod/.bazelversion b/examples/bzlmod/.bazelversion
index 6b4ab2c..09b254e 100644
--- a/examples/bzlmod/.bazelversion
+++ b/examples/bzlmod/.bazelversion
@@ -1 +1 @@
-6.0.0rc1
\ No newline at end of file
+6.0.0

internal_setup.bzl

diff --git a/internal_setup.bzl b/internal_setup.bzl
index beb26e8..f4d3a1a 100644
--- a/internal_setup.bzl
+++ b/internal_setup.bzl
@@ -31,13 +31,6 @@
     # Depend on the Bazel binaries for running bazel-in-bazel tests
     bazel_binaries(versions = SUPPORTED_BAZEL_VERSIONS)
 
-    # Bazel 5.3.0 has bzlmod bugs so we use 6.0 prerelease for the bzlmod example.
-    # SUPPORTED_BAZEL_VERSIONS doesn't currently support multiple versions. For now,
-    # we only want to run the bzlmod example with a separate version.
-    bazel_binaries(versions = [
-        "6.0.0rc1",
-    ])
-
     bazel_skylib_workspace()
 
     # gazelle:repository_macro gazelle/deps.bzl%gazelle_deps