Change link-checker to lychee and weekly checks (#181)

Lychee is a better link checker and faster

Reviewed-on: https://gitea.com/gitea/awesome-gitea/pulls/181
Reviewed-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: Nicolas <bircni@icloud.com>
Co-committed-by: Nicolas <bircni@icloud.com>

.gitea/workflows/testlinks.yml

@@ -1,16 +1,26 @@
-name: Test links
+name: Link checker
+
 on:
-  - push
-  - pull_request
+  push:
+  pull_request:
+  schedule:
+    - cron: '0 0 * * 0' # Sunday 00:00 UTC
 
 jobs:
-  check_urls:
+  lychee:
+    name: lychee
     runs-on: ubuntu-latest
+    timeout-minutes: 30
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v2
-      - name: Link check action
-        uses: serega404/links-check-action@v0.0.1
+        uses: actions/checkout@v4
+
+      - name: Link Checker
+        uses: lycheeverse/lychee-action@v2
         with:
-          filePath: "README.md"
-          ignoreCodes: "403,418"
+          jobSummary: false
+          args: >-
+            --no-progress
+            --max-redirects 0
+            --accept 100..=103,200..=299,301..=308,403,418
+            '**/*.md'