win_updates: Correctly report changes on success (2.7 backport) (#50225)

* win_updates: Correctly report changes on success

* Add changelog fragment

changelogs/fragments/50185-win_updates-report-changes-correctly.yml

@@ -0,0 +1,3 @@
+---
+bugfixes:
+- win_updates - Correctly report changes on success

lib/ansible/modules/windows/win_updates.ps1

@@ -347,6 +347,10 @@ $update_script_block = {
         $result.installed_update_count = $update_success_count
         $result.failed_update_count = $update_fail_count
 
+        if ($updates_success_count -gt 0) {
+            $result.changed = $true
+        }
+
         if ($update_fail_count -gt 0) {
             $result.failed = $true
             $result.msg = "Failed to install one or more updates"