Pluralize domain and path label in deep links panel (#9790)

* Pluralize domain label in deep links panel

* Fix pluralization Path notification

* Update release notes for deep links tool

Pluralized 'domain' and 'path' in validation summary notification titles.

* Update packages/devtools_app/release_notes/NEXT_RELEASE_NOTES.md

Co-authored-by: Kenzie Davisson <43759233+kenzieschmoll@users.noreply.github.com>

* Fix formatting

---------

Co-authored-by: Kenzie Davisson <43759233+kenzieschmoll@users.noreply.github.com>

packages/devtools_app/lib/src/screens/deep_link_validation/deep_link_list_view.dart

diff --git a/packages/devtools_app/lib/src/screens/deep_link_validation/deep_link_list_view.dart b/packages/devtools_app/lib/src/screens/deep_link_validation/deep_link_list_view.dart
index 56308e8..75a9084 100644
--- a/packages/devtools_app/lib/src/screens/deep_link_validation/deep_link_list_view.dart
+++ b/packages/devtools_app/lib/src/screens/deep_link_validation/deep_link_list_view.dart
@@ -3,6 +3,7 @@
 // found in the LICENSE file or at https://developers.google.com/open-source/licenses/bsd.
 
 import 'package:devtools_app_shared/ui.dart';
+import 'package:devtools_app_shared/utils.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 
@@ -439,7 +440,8 @@
           children: [
             if (domainErrorCount > 0)
               NotificationCard(
-                title: '$domainErrorCount domain not verified',
+                title:
+                    '$domainErrorCount ${pluralize('domain', domainErrorCount)} not verified',
                 description:
                     'This affects all deep links. Fix issues to make users go directly to your app.',
                 actionButton: TextButton(
@@ -461,7 +463,8 @@
               const SizedBox(width: defaultSpacing),
             if (pathErrorCount > 0)
               NotificationCard(
-                title: '$pathErrorCount path not working',
+                title:
+                    '$pathErrorCount ${pluralize('path', pathErrorCount)} not working',
                 description:
                     'Fix these path to make sure users are directed to your app',
                 actionButton: TextButton(

packages/devtools_app/release_notes/NEXT_RELEASE_NOTES.md

diff --git a/packages/devtools_app/release_notes/NEXT_RELEASE_NOTES.md b/packages/devtools_app/release_notes/NEXT_RELEASE_NOTES.md
index 323d3c1..9bbdfe3 100644
--- a/packages/devtools_app/release_notes/NEXT_RELEASE_NOTES.md
+++ b/packages/devtools_app/release_notes/NEXT_RELEASE_NOTES.md
@@ -58,7 +58,7 @@
 
 ## Deep links tool updates
 
-TODO: Remove this section if there are not any updates.
+- Pluralized "domain" and "path" in the validation summary notification titles when multiple errors are present. [#9790](https://github.com/flutter/devtools/pull/9790)
 
 ## VS Code sidebar updates