chore(ci): change link check flow schedule from daily to weekly (ethereum#1592)

* chore(ci): only run the link checker flow once per week

* chore(ci): rename workflow for consistency

Author: danceratopz

.github/workflows/check-links.yml renamed to .github/workflows/check_links.yml

@@ -4,7 +4,7 @@ on:
   repository_dispatch:
   workflow_dispatch:
   schedule:
-    - cron: "00 12 * * *"
+    - cron: "00 12 * * 1" # Run weekly on Mondays at 12:00 UTC
 
 jobs:
   linkChecker: