Update help_app to cnqGc0zHoLZzSKNvwi5e6XGyrYFhP1ILa3OsLp_g0PMC CIPD package.

CIPD package: https://chrome-infra-packages.appspot.com/p/chromeos_internal/apps/help_app/app/+/cnqGc0zHoLZzSKNvwi5e6XGyrYFhP1ILa3OsLp_g0PMC

Release notes: http://go/help_app-x20/relnotes/Nightly/help_app_nightly_202005180800_RC00.html

Cq-Include-Trybots: chrome/try:linux-chromeos-chrome
Change-Id: Ibe09e7cdd19c34bb211a41a450c7b70349b6c279
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2208150Reviewed-by: Trent Apted <tapted@chromium.org>
Commit-Queue: Trent Apted <tapted@chromium.org>
Commit-Queue: Rachel Carpenter <carpenterr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#769978}

DEPS

@@ -1533,7 +1533,7 @@ deps = {
     'packages': [
       {
         'package': 'chromeos_internal/apps/help_app/app',
-        'version': 'YRKD4DdKVRvZONNOuV2-aKf-C92zRhZYajwbvbdSWQ8C',
+        'version': 'cnqGc0zHoLZzSKNvwi5e6XGyrYFhP1ILa3OsLp_g0PMC',
       },
     ],
     'condition': 'checkout_chromeos and checkout_src_internal',