Add cron and issue creation

Author: lyashevska

.github/dependabot.yml

@@ -0,0 +1,6 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: ".github/workflows"
+    schedule:
+      interval: "daily"

.github/workflows/markdown-link-check.yml

@@ -7,6 +7,8 @@ on:
   pull_request:
     branches:
     - main
+  schedule:
+    - cron: '0 0 * * 0' # every Sunday at 00:00
 
 jobs:
   linkChecker:
@@ -17,3 +19,15 @@ jobs:
       - name: Link Checker
         id: lychee
         uses: lycheeverse/lychee-action@v1
+        with:
+          # fail action if there are broken links
+          fail: true
+
+      - name: Create Issue From File
+        # create issues only when triggered by schedule
+        if: github.event_name == 'schedule' && env.lychee_exit_code != 0
+        uses: peter-evans/create-issue-from-file@v4
+        with:
+          title: Link Checker Report
+          content-filepath: ./lychee/out.md
+          labels: report, automated issue