Roll Help App from 69VjTA0ZK... to 8CHDR6OyU...

Release_Notes: http://go/help_app-x20/relnotes/Main/help_app_nightly_202101190600_RC00.html

https://chrome-infra-packages.appspot.com/p/chromeos_internal/apps/help_app/app/+/8CHDR6OyUJOhDursCeohpsk9HLyo0NS2MhikX4GjSPgC

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://skia-autoroll.corp.goog/r/help-app-chromium-autoroll
Please CC help-app@grotations.appspotmail.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/master/autoroll/README.md

Cq-Include-Trybots: luci.chrome.try:linux-chromeos-chrome
Bug: None
Tbr: help-app@grotations.appspotmail.com
Change-Id: Id52d3245940ff39276a3aef3822fbbb07a993af1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2637893Reviewed-by: chromium-internal-autoroll <chromium-internal-autoroll@skia-corp.google.com.iam.gserviceaccount.com>
Commit-Queue: chromium-internal-autoroll <chromium-internal-autoroll@skia-corp.google.com.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#844790}

DEPS

@@ -1595,7 +1595,7 @@ deps = {
     'packages': [
       {
         'package': 'chromeos_internal/apps/help_app/app',
-        'version': '69VjTA0ZKwsJNTOyvk6Q68sahYC23kY9GOAyQSnd2wEC',
+        'version': '8CHDR6OyUJOhDursCeohpsk9HLyo0NS2MhikX4GjSPgC',
       },
     ],
     'condition': 'checkout_chromeos and checkout_src_internal',