Restore auto-release time to the original value

This was set temporarily 4h later than originally intended so that it
would go through the day that we expected it to. Now that we know it
worked, let's restore it back to the time that matches morning in SFO &
early evening in Europe.

I see no reason to create extra PR work, shipping it straight into main.
FTR, this changes a single value, 21 -> 17, and a few comments.

Signed-off-by: Gerhard Lazu <gerhard@lazu.co.uk>

.github/workflows/auto-release.yml

@@ -6,10 +6,10 @@ concurrency: release
 on:
   # This runs on a schedule by default:
   schedule:
-    # https://crontab.guru/#6_21_*_*_2
-    # Every Tuesday at 9:06pm UTC & 1:06pm US West Coast.
+    # https://crontab.guru/#6_17_*_*_2
+    # Every Tuesday at 5:06pm UTC & 9:06am US West Coast.
     # GitHub Actions defaults to UTC:
-    - cron: '6 21 * * 2'
+    - cron: '6 17 * * 2'
     # There is high load on GitHub Actions at the top of the hour:
     #
     #     Note: The schedule event can be delayed during periods of high loads of