Apply suggestion from @gemini-code-assist[bot]

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
Signed-off-by: Todd Baert <[email protected]>

Author: toddbaert

blog/2025-11-18-kubecon-na-recap-and-new-cncf-training.md

@@ -43,7 +43,7 @@ It's clear that feature flagging is a hot topic, and we're thrilled to see so mu
 ## New CNCF Training Course: Feature Flagging with OpenFeature
 
 <p style={{textAlign: 'center'}}>
-  <img src={require('@site/static/img/blog/2025-11-18-kubecon-na-recap-and-new-cncf-training/lfs140.png').default} />
+  <img alt="CNCF training course banner for Feature Flagging with OpenFeature (LFS140)" src={require('@site/static/img/blog/2025-11-18-kubecon-na-recap-and-new-cncf-training/lfs140.png').default} />
 </p>
 
 We're happy to announce the launch of our official CNCF training course: [Feature Flagging with OpenFeature (LFS140)](https://training.linuxfoundation.org/training/feature-flagging-with-openfeature-lfs140/).