Fixed links in ToC & landing page

Author: ntrogh

articles/load-testing/index.yml

@@ -39,7 +39,7 @@ landingContent:
           - text: Identify performance bottlenecks
             url: tutorial-identify-bottlenecks-azure-portal.md
           - text: Set up automated regression testing with CI/CD
-            url: tutorial-cicd-azure-pipelines.md
+            url: tutorial-identify-performance-regression-with-cicd.md
 
   # Card
   - title: Configure load tests

articles/load-testing/toc.yml

@@ -17,7 +17,7 @@ items:
     - name: Identify performance bottlenecks
       href: tutorial-identify-bottlenecks-azure-portal.md
     - name: Automate regression tests with CI/CD
-      href: tutorial-cicd-azure-pipelines.md
+      href: tutorial-identify-performance-regression-with-cicd.md
 - name: Concepts
   items: 
     - name: Key concepts