Add 'idp-best-practices' tag to deployment guardrails blog post (#16175)

Author: adamgordonbell

content/blog/deployment-guardrails-with-policy-as-code/index.md

@@ -17,6 +17,7 @@ tags:
     - security
     - self-service
     - guardrails
+    - idp-best-practices
 ---
 
 Welcome to the third post in our **IDP Best Practices** series, where we explore how to implement **policy as code** with [Pulumi CrossGuard](/docs/iac/packages-and-automation/crossguard) to create deployment guardrails that make self-service infrastructure both powerful and safe.