chore(main): release grafeas-v1 1.6.0 (#32364)

* chore(main): release grafeas-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

@@ -1033,7 +1033,7 @@
   "google-shopping-merchant-reviews-v1beta+FILLER": "0.0.0",
   "grafeas": "1.5.3",
   "grafeas+FILLER": "0.0.0",
-  "grafeas-v1": "1.5.1",
+  "grafeas-v1": "1.6.0",
   "grafeas-v1+FILLER": "0.0.0",
   "stackdriver": "0.23.0",
   "stackdriver+FILLER": "0.0.0",

grafeas-v1/CHANGELOG.md

@@ -1,5 +1,12 @@
 # Release History
 
+### 1.6.0 (2026-01-13)
+
+#### Features
+
+* A new field `files` is added to message `.grafeas.v1.DiscoveryOccurrence` 
+* A new message `File` is added ([#32345](https://github.com/googleapis/google-cloud-ruby/issues/32345)) 
+
 ### 1.5.1 (2025-10-27)
 
 #### Documentation

grafeas-v1/lib/grafeas/v1/version.rb

@@ -19,6 +19,6 @@
 
 module Grafeas
   module V1
-    VERSION = "1.5.1"
+    VERSION = "1.6.0"
   end
 end

grafeas-v1/snippets/snippet_metadata_grafeas.v1.json

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