chore(main): release google-cloud-datastore-v1 1.6.0 (#33066)

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

* 🦉 Updates from OwlBot post-processor

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

---------

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>

Author: release-please[bot]

.release-please-manifest.json

@@ -339,7 +339,7 @@
   "google-cloud-datastore-admin+FILLER": "0.0.0",
   "google-cloud-datastore-admin-v1": "1.6.0",
   "google-cloud-datastore-admin-v1+FILLER": "0.0.0",
-  "google-cloud-datastore-v1": "1.5.1",
+  "google-cloud-datastore-v1": "1.6.0",
   "google-cloud-datastore-v1+FILLER": "0.0.0",
   "google-cloud-datastream": "2.1.0",
   "google-cloud-datastream+FILLER": "0.0.0",

google-cloud-datastore-v1/CHANGELOG.md

@@ -1,5 +1,16 @@
 # Release History
 
+### 1.6.0 (2026-03-31)
+
+#### Features
+
+* Add irb as explicit dependency for Ruby 4.0 compatibility ([#32885](https://github.com/googleapis/google-cloud-ruby/issues/32885)) 
+* Update minimum Ruby to v3.2 and required dependencies for Ruby v4.0 ([#32849](https://github.com/googleapis/google-cloud-ruby/issues/32849)) 
+* Update minimum Ruby to v3.2 and required dependencies for Ruby v4.0 ([#32851](https://github.com/googleapis/google-cloud-ruby/issues/32851)) 
+* Update minimum Ruby to v3.2 and required dependencies for Ruby v4.0 ([#32853](https://github.com/googleapis/google-cloud-ruby/issues/32853)) 
+* Update minimum Ruby to v3.2 and required dependencies for Ruby v4.0 ([#32854](https://github.com/googleapis/google-cloud-ruby/issues/32854)) 
+* Update minimum Ruby to v3.2 and required dependencies for Ruby v4.0 ([#32855](https://github.com/googleapis/google-cloud-ruby/issues/32855)) 
+
 ### 1.5.1 (2025-10-27)
 
 #### Documentation

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

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

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

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