chore(main): release google-cloud-container_analysis 1.6.0 (#33038)

* chore(main): release google-cloud-container_analysis 1.6.0

* chore: combine duplicate Ruby 4.0 release notes

---------

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>
Co-authored-by: Yoshi Automation Bot <yoshi-automation@google.com>

Author: release-please[bot]

.release-please-manifest.json

@@ -269,7 +269,7 @@
   "google-cloud-container-v1+FILLER": "0.0.0",
   "google-cloud-container-v1beta1": "0.53.0",
   "google-cloud-container-v1beta1+FILLER": "0.0.0",
-  "google-cloud-container_analysis": "1.5.4",
+  "google-cloud-container_analysis": "1.6.0",
   "google-cloud-container_analysis+FILLER": "0.0.0",
   "google-cloud-container_analysis-v1": "1.6.0",
   "google-cloud-container_analysis-v1+FILLER": "0.0.0",

google-cloud-container_analysis/CHANGELOG.md

@@ -1,5 +1,11 @@
 # Release History
 
+### 1.6.0 (2026-03-19)
+
+#### Features
+
+* Upgrade dependencies for Ruby v4.0 and drop Ruby v3.1 support
+
 ### 1.5.4 (2025-09-12)
 
 #### Documentation

google-cloud-container_analysis/lib/google/cloud/container_analysis/version.rb

@@ -20,7 +20,7 @@
 module Google
   module Cloud
     module ContainerAnalysis
-      VERSION = "1.5.4"
+      VERSION = "1.6.0"
     end
   end
 end