Update dependency bazel_gazelle to v0.40.0

Author: renovate[bot]

WORKSPACE

@@ -31,10 +31,10 @@ http_archive(
 
 http_archive(
     name = "bazel_gazelle",
-    sha256 = "75df288c4b31c81eb50f51e2e14f4763cb7548daae126817247064637fd9ea62",
+    sha256 = "26be38709f5629d712a1846bdc4f05dd0130f40f02ccf758e90e6926e1305863",
     urls = [
-        "https://mirror.bazel.build/github.com/bazelbuild/bazel-gazelle/releases/download/v0.36.0/bazel-gazelle-v0.36.0.tar.gz",
-        "https://github.com/bazelbuild/bazel-gazelle/releases/download/v0.36.0/bazel-gazelle-v0.36.0.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",
     ],
 )