Disable "test-upstreams" action except in workflow dispatch case (#569)

.github/workflows/test-upstreams.yml

@@ -5,14 +5,14 @@ name: Test Upstreams
 
 on:
   workflow_dispatch:
-  push:
-    branches:
-      - main
-  schedule:
-    # <minute [0,59]> <hour [0,23]> <day of the month [1,31]> <month of the year [1,12]> <day of the week [0,6]>
-    # https://pubs.opengroup.org/onlinepubs/9699919799/utilities/crontab.html#tag_20_25_07
-    # Run every Mon,Wed,Thurs at 19:00:00 UTC (Monday at 11:00:00 PST)
-    - cron: "0 19 * * 1,3,4"
+  # push:
+  #   branches:
+  #     - main
+  # schedule:
+  #   # <minute [0,59]> <hour [0,23]> <day of the month [1,31]> <month of the year [1,12]> <day of the week [0,6]>
+  #   # https://pubs.opengroup.org/onlinepubs/9699919799/utilities/crontab.html#tag_20_25_07
+  #   # Run every Mon,Wed,Thurs at 19:00:00 UTC (Monday at 11:00:00 PST)
+  #   - cron: "0 19 * * 1,3,4"
 
 jobs:
   test-core-lib: