fix image

Author: Pokrel

docs/pages/devops_intro.html

@@ -1,6 +1,6 @@
 <p>DevOps covers the whole software development lifecycle, so you work with lots of different tools and technologies. Plus, DevOps is still evolving and there are lots of new tools being developed all the time.</p>
 <p>&nbsp;</p>
-<img src="images/cicd-pipeline.png" alt="CI/CD pipeline example">
+<img src="images/cicd-pipeline.PNG" alt="CI/CD pipeline example">
 <p>&nbsp;</p>
 <p>From which background are you transitioning into DevOps?</p>
 <ol>