Update dependency bazel_gazelle to v0.40.0

Author: renovate[bot]

deps.bzl

@@ -3,10 +3,10 @@ load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
 def dependencies():
     http_archive(
         name = "bazel_gazelle",
-        sha256 = "501deb3d5695ab658e82f6f6f549ba681ea3ca2a5fb7911154b5aa45596183fa",
+        sha256 = "26be38709f5629d712a1846bdc4f05dd0130f40f02ccf758e90e6926e1305863",
         urls = [
-            "https://mirror.bazel.build/github.com/bazelbuild/bazel-gazelle/releases/download/v0.26.0/bazel-gazelle-v0.26.0.tar.gz",
-            "https://github.com/bazelbuild/bazel-gazelle/releases/download/v0.26.0/bazel-gazelle-v0.26.0.tar.gz",
+            "https://mirror.bazel.build/github.com/bazelbuild/bazel-gazelle/releases/download/v0.40.0/bazel-gazelle-v0.40.0.tar.gz",
+            "https://github.com/bazelbuild/bazel-gazelle/releases/download/v0.40.0/bazel-gazelle-v0.40.0.tar.gz",
         ],
     )
     http_archive(