fix learning lab error (#3320)

[ X ] Check if this is a typo or other quick fix and ignore the rest :)

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Signed-off-by: s-stumbo <sally.stumbo@chainguard.dev>

Author: s-stumbo

content/software-security/learning-labs/ll202604.md

@@ -15,7 +15,7 @@ toc: true
 ---
 
 The April 2026 Learning Lab with Erika Heidi goes through how attackers exploit vulnerable GitHub Actions workflows, and how Chainguard can protect your CI/CD pipelines from these threats. 
-{{< youtube D9tORVR4H9g }}
+{{< youtube D9tORVR4H9g >}}
 
 ## Sections