chore(main): release google-cloud-translate-v3 1.9.0 (#33818)

* chore(main): release google-cloud-translate-v3 1.9.0

* 🦉 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

@@ -851,7 +851,7 @@
   "google-cloud-translate+FILLER": "0.0.0",
   "google-cloud-translate-v2": "1.1.0",
   "google-cloud-translate-v2+FILLER": "0.0.0",
-  "google-cloud-translate-v3": "1.8.0",
+  "google-cloud-translate-v3": "1.9.0",
   "google-cloud-translate-v3+FILLER": "0.0.0",
   "google-cloud-video-live_stream": "2.1.0",
   "google-cloud-video-live_stream+FILLER": "0.0.0",

google-cloud-translate-v3/CHANGELOG.md

@@ -1,5 +1,11 @@
 # Release History
 
+### 1.9.0 (2026-04-09)
+
+#### Features
+
+* A new field `mime_type` is added to message `.google.cloud.translation.v3.AdaptiveMtTranslateRequest` ([#33808](https://github.com/googleapis/google-cloud-ruby/issues/33808)) 
+
 ### 1.8.0 (2026-03-31)
 
 #### Features

google-cloud-translate-v3/lib/google/cloud/translate/v3/version.rb

@@ -21,7 +21,7 @@ module Google
   module Cloud
     module Translate
       module V3
-        VERSION = "1.8.0"
+        VERSION = "1.9.0"
       end
     end
   end

google-cloud-translate-v3/snippets/snippet_metadata_google.cloud.translation.v3.json

@@ -1,7 +1,7 @@
 {
   "client_library": {
     "name": "google-cloud-translate-v3",
-    "version": "1.8.0",
+    "version": "1.9.0",
     "language": "RUBY",
     "apis": [
       {