Stripped trailing newline from lychee args, covered all files, disabled verbosity, added check emails/fragments + caching

Co-Authored-By: MichaIng <micha@dietpi.com>

Author: adamlui

.github/workflows/check-links-on-push-pr.yml

@@ -22,10 +22,11 @@ jobs:
       - name: Check links
         uses: lycheeverse/lychee-action@v2.8.0
         with:
-          # Check all MD files, ignore ok/redir/blocked/rate-limited
-          args: >
-            "*.md" "**/*.md"
-            --verbose --no-progress
+          # Check all files, ignore ok/redir/blocked/rate-limited
+          args: >-
+            . --no-progress --include-mail
+            --include-fragments --index-files README.md,docs/README.md --exclude "#readme"
             --accept 200..299,300..399,403,429
+            --cache --max-cache-age 3d
         env:
           GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}