chore(main): release google-cloud-spanner-admin-database-v1 1.13.1 (#33732)

* chore(main): release google-cloud-spanner-admin-database-v1 1.13.1

* 🦉 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

@@ -775,7 +775,7 @@
   "google-cloud-shell+FILLER": "0.0.0",
   "google-cloud-shell-v1": "1.7.1",
   "google-cloud-shell-v1+FILLER": "0.0.0",
-  "google-cloud-spanner-admin-database-v1": "1.13.0",
+  "google-cloud-spanner-admin-database-v1": "1.13.1",
   "google-cloud-spanner-admin-database-v1+FILLER": "0.0.0",
   "google-cloud-spanner-admin-instance-v1": "2.7.1",
   "google-cloud-spanner-admin-instance-v1+FILLER": "0.0.0",

google-cloud-spanner-admin-database-v1/CHANGELOG.md

@@ -1,5 +1,11 @@
 # Release History
 
+### 1.13.1 (2026-04-03)
+
+#### Documentation
+
+* update SelectiveGapicGeneration usage doc ([#33482](https://github.com/googleapis/google-cloud-ruby/issues/33482)) 
+
 ### 1.13.0 (2026-04-02)
 
 #### Features

google-cloud-spanner-admin-database-v1/lib/google/cloud/spanner/admin/database/v1/version.rb

@@ -23,7 +23,7 @@ module Spanner
       module Admin
         module Database
           module V1
-            VERSION = "1.13.0"
+            VERSION = "1.13.1"
           end
         end
       end

google-cloud-spanner-admin-database-v1/snippets/snippet_metadata_google.spanner.admin.database.v1.json

@@ -1,7 +1,7 @@
 {
   "client_library": {
     "name": "google-cloud-spanner-admin-database-v1",
-    "version": "1.13.0",
+    "version": "1.13.1",
     "language": "RUBY",
     "apis": [
       {