.github/workflows/ingest: Update schedule to 17:15 UTC

Avoid the start of the hour to avoid getting dropped during high load
times.

<nextstrain/.github#153>

Author: joverlee521

.github/workflows/fetch-and-ingest.yaml

@@ -17,10 +17,12 @@ on:
     # Tool that deciphers this particular format of crontab string:
     #  - https://crontab.guru/
     #
-    # Runs at 5pm UTC (1pm EDT/10am PDT) since curation by NCBI happens on the East Coast.
+    # Runs at 5:15pm UTC (1:15pm EDT/10:15am PDT) since curation by NCBI happens on the East Coast.
     # We were running into invalid zip archive errors at 9am PDT, so hoping an hour
     # delay will lower the error frequency
-    - cron: '0 17 * * *'
+    # Avoid start of the hour to avoid getting dropped during high load times:
+    #   - https://github.com/nextstrain/.github/issues/153
+    - cron: '15 17 * * *'
 
   repository_dispatch:
     types: