FIX: update linkchecker (#563)

* FIX: update accept on 200

* run weekly not daily

Author: mmcky

.github/workflows/linkcheck.yml

@@ -2,7 +2,7 @@ name: Link Checker (lychee)
 on:
   schedule:
     # UTC 23:00 is early morning in Australia (9am)
-    - cron:  '0 23 * * *'
+    - cron:  '0 23 * * 1'
   workflow_dispatch:
 jobs:
   link-checking:
@@ -21,7 +21,7 @@ jobs:
         uses: lycheeverse/lychee-action@v2
         with:
           fail: false
-          args: --accept 403,503 *.html
+          args: --accept 200,403,503 *.html
       - name: Create Issue From File
         if: steps.lychee.outputs.exit_code != 0
         uses: peter-evans/create-issue-from-file@v5