chromedriver: 2.39 -> 2.40 (#42042)

Semi-automatic update generated by https://github.com/ryantm/nixpkgs-update tools.

This update was made based on information from https://repology.org/metapackage/chromedriver/versions.

These checks were done:

- built on NixOS
- /nix/store/b62dsg9dibywkpx8yzfm08dbcdfh9i60-chromedriver-2.40/bin/chromedriver passed the binary check.
- Warning: no invocation of /nix/store/b62dsg9dibywkpx8yzfm08dbcdfh9i60-chromedriver-2.40/bin/.chromedriver-wrapped had a zero exit code or showed the expected version
- 1 of 2 passed binary check by having a zero exit code.
- 0 of 2 passed binary check by having the new version present in output.
- found 2.40 with grep in /nix/store/b62dsg9dibywkpx8yzfm08dbcdfh9i60-chromedriver-2.40
- directory tree listing: https://gist.github.com/2beed7dbaa434f54d37a742a2c0e2662
- du listing: https://gist.github.com/8b1a61054a03382c346ba383ac79c163

pkgs/development/tools/selenium/chromedriver/default.nix

@@ -6,7 +6,7 @@ let
   allSpecs = {
     "x86_64-linux" = {
       system = "linux64";
-      sha256 = "1rkdlf9v5lciaq3yp7cp2vwmca612vngbcnz55ck76jgx6rknh3g";
+      sha256 = "07b39j1glr53yxbbkkkkx12h8r44fybqkn4fd7s2lr1ysyq5vn1a";
     };
 
     "x86_64-darwin" = {
@@ -28,7 +28,7 @@ let
 in
 stdenv.mkDerivation rec {
   name = "chromedriver-${version}";
-  version = "2.39";
+  version = "2.40";
 
   src = fetchurl {
     url = "http://chromedriver.storage.googleapis.com/${version}/chromedriver_${spec.system}.zip";