chore(main): release google-cloud-shell-v1 1.6.0 (#33289)

* chore(main): release google-cloud-shell-v1 1.6.0

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

* 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: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>
Co-authored-by: Yoshi Automation Bot <yoshi-automation@google.com>

Author: 3 people

.release-please-manifest.json

@@ -773,7 +773,7 @@
   "google-cloud-service_usage-v1+FILLER": "0.0.0",
   "google-cloud-shell": "1.5.2",
   "google-cloud-shell+FILLER": "0.0.0",
-  "google-cloud-shell-v1": "1.5.1",
+  "google-cloud-shell-v1": "1.6.0",
   "google-cloud-shell-v1+FILLER": "0.0.0",
   "google-cloud-spanner-admin-database-v1": "1.12.0",
   "google-cloud-spanner-admin-database-v1+FILLER": "0.0.0",

google-cloud-shell-v1/CHANGELOG.md

@@ -1,5 +1,11 @@
 # Changelog
 
+### 1.6.0 (2026-03-19)
+
+#### Features
+
+* Upgrade dependencies for Ruby v4.0 and drop Ruby v3.1 support
+
 ### 1.5.1 (2025-10-27)
 
 #### Documentation

google-cloud-shell-v1/lib/google/cloud/shell/v1/version.rb

@@ -21,7 +21,7 @@ module Google
   module Cloud
     module Shell
       module V1
-        VERSION = "1.5.1"
+        VERSION = "1.6.0"
       end
     end
   end

google-cloud-shell-v1/snippets/snippet_metadata_google.cloud.shell.v1.json

@@ -1,7 +1,7 @@
 {
   "client_library": {
     "name": "google-cloud-shell-v1",
-    "version": "1.5.1",
+    "version": "1.6.0",
     "language": "RUBY",
     "apis": [
       {