[zscaler] Mark package as deprecated

packages/zscaler/changelog.yml

@@ -1,4 +1,9 @@
 # newer versions go on top
+- version: "0.5.1"
+  changes:
+    - description: Mark package as deprecated. Use the zscaler_zia package instead.
+      type: enhancement
+      link: https://github.com/elastic/integrations/pull/
 - version: "0.5.0"
   changes:
     - description: Update to ECS 8.0.0

packages/zscaler/docs/README.md

@@ -1,4 +1,6 @@
-# Zscaler integration
+# Zscaler integration (Deprecated)
+
+_This integration is deprecated. Please migrate to the Zscaler ZIA integration._
 
 This integration is for Zscaler device's logs. It includes the following
 datasets for receiving logs over syslog or read from a file:

packages/zscaler/manifest.yml

@@ -1,8 +1,8 @@
 format_version: 1.0.0
 name: zscaler
 title: Zscaler NSS Logs
-version: 0.5.0
-description: Collect and parse logs from Zscaler devices with Elastic Agent.
+version: 0.5.1
+description: Deprecated. Use the Zscaler ZIA integration instead.
 categories: ["network", "security"]
 release: experimental
 license: basic