Adjust chain workflow steps (#9753)

.github/chain-types.md

@@ -1,10 +0,0 @@
----
-title: Outdated chain types
-labels: ['ci']
----
-
-cc @polkadot-js/notifications
-
-Some configured chains have outdated types and is determined to problematic as an available chain.
-
-Check the nightly cron output (or via `yarn ci:chainTypes` locally) and disable the chains (either with `isDisabled` or `isUnreachable`) until the issue is resolved. The output as found from the test includes:

.github/workflows/chain-endpoints.yml

@@ -1,7 +1,10 @@
 name: Chain endpoints
 on:
   schedule:
-    - cron:  '50 0/12 * * *'
+    # twice daily (mornings/afternoons, the latter being busy)
+    # - cron:  '50 0/12 * * *'
+    # once daily (early mornings, 02:50 GMT, generally not busy)
+    - cron:  '50 2 * * *'
 
 jobs:
   endpoints:

.github/workflows/chain-types.yml

@@ -1,28 +0,0 @@
-name: Chain types
-on:
-  schedule:
-    - cron:  '30 0/12 * * *'
-
-jobs:
-  types:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v3
-    - uses: actions/setup-node@v3
-      with:
-        node-version: 'lts/*'
-    - name: check
-      env:
-        CI_LOG: 123
-      run: |
-        yarn install --immutable
-        yarn ci:chainTypes
-
-    - name: issue
-      if: ${{ failure() }}
-      uses: JasonEtco/create-an-issue@e27dddc79c92bc6e4562f268fffa5ed752639abd
-      env:
-        GITHUB_TOKEN: ${{ secrets.GH_PAT_BOT }}
-      with:
-        filename: .github/chain-types.md
-        update_existing: true