Update help_app to vqT-WqhwS504vwcLdBC9Y998VXTrAydEbVVHCjdZSPMC CIPD package.

CIPD package: https://chrome-infra-packages.appspot.com/p/chromeos_internal/apps/help_app/app/+/vqT-WqhwS504vwcLdBC9Y998VXTrAydEbVVHCjdZSPMC

Release notes: http://go/help_app-x20/relnotes/Nightly/help_app_nightly_202007160800_RC00.html

Cq-Include-Trybots: chrome/try:linux-chromeos-chrome
Change-Id: Iaa9b1d2fae90f6118a7c79ba45192441ea066f55
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2303335Reviewed-by: Rachel Carpenter <carpenterr@chromium.org>
Commit-Queue: Zufeng Wang <zufeng@google.com>
Cr-Commit-Position: refs/heads/master@{#789388}

DEPS

@@ -1560,7 +1560,7 @@ deps = {
     'packages': [
       {
         'package': 'chromeos_internal/apps/help_app/app',
-        'version': '1XLVSh3k-pIPAMRHWfJCplE490YVs_aTLs81WqTGqUgC',
+        'version': 'vqT-WqhwS504vwcLdBC9Y998VXTrAydEbVVHCjdZSPMC',
       },
     ],
     'condition': 'checkout_chromeos and checkout_src_internal',