Update links.yml (#13563)

Signed-off-by: Glenn Jocher <glenn.jocher@ultralytics.com>

.github/workflows/links.yml

@@ -33,7 +33,6 @@ jobs:
           retry_delay_seconds: 60
           retries: 2
           run: |
-            set -o pipefail  # preserve exit code from lychee command in pipeline
             lychee \
             --scheme 'https' \
             --timeout 60 \
@@ -47,6 +46,11 @@ jobs:
             './**/*.md' \
             './**/*.html' | tee -a $GITHUB_STEP_SUMMARY
 
+            # Raise error if broken links found
+            if ! grep -q "0 Errors" $GITHUB_STEP_SUMMARY; then
+              exit 1
+            fi
+
       - name: Test Markdown, HTML, YAML, Python and Notebook links with retry
         if: github.event_name == 'workflow_dispatch'
         uses: ultralytics/actions/retry@main
@@ -55,7 +59,6 @@ jobs:
           retry_delay_seconds: 60
           retries: 2
           run: |
-            set -o pipefail  # preserve exit code from lychee command in pipeline
             lychee \
             --scheme 'https' \
             --timeout 60 \
@@ -72,3 +75,8 @@ jobs:
             './**/*.yaml' \
             './**/*.py' \
             './**/*.ipynb' | tee -a $GITHUB_STEP_SUMMARY
+
+            # Raise error if broken links found
+            if ! grep -q "0 Errors" $GITHUB_STEP_SUMMARY; then
+              exit 1
+            fi