chore(main): release activerecord-spanner-adapter 2.1.0 (#351)

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>

Author: release-please[bot]

.release-please-manifest.json

@@ -1,3 +1,3 @@
 {
-  ".": "2.0.0"
+  ".": "2.1.0"
 }

CHANGELOG.md

@@ -1,5 +1,15 @@
 # Changelog
 
+### 2.1.0 (2025-03-17)
+
+#### Features
+
+* support IDENTITY columns for auto-generated primary keys ([#352](https://github.com/googleapis/ruby-spanner-activerecord/issues/352)) 
+#### Documentation
+
+* add a test to verify that FOR UPDATE can be used ([#348](https://github.com/googleapis/ruby-spanner-activerecord/issues/348)) 
+* update README with the correct supported versions ([#349](https://github.com/googleapis/ruby-spanner-activerecord/issues/349)) 
+
 ### 2.0.0 (2025-01-23)
 
 ### ⚠ BREAKING CHANGES

lib/activerecord_spanner_adapter/version.rb

@@ -5,5 +5,5 @@
 # https://opensource.org/licenses/MIT.
 
 module ActiveRecordSpannerAdapter
-  VERSION = "2.0.0".freeze
+  VERSION = "2.1.0".freeze
 end