desktop_photo_search: getSavePath is deprecated (#1910)

This PR fixes a [CI
breakage](https://github.com/flutter/samples/actions/runs/5362518576/jobs/9729453534):

```console
Analyzing fluent_ui...

   info - lib/src/widgets/unsplash_search_content.dart:51:38 - 'getSavePath' is deprecated and shouldn't be used. Use getSaveLocation instead. Try replacing the use of the deprecated member with the replacement. - deprecated_member_use

1 issue found.
Error: Process completed with exit code 1.
```

## Pre-launch Checklist

- [x] I read the [Flutter Style Guide] _recently_, and have followed its
advice.
- [x] I signed the [CLA].
- [x] I read the [Contributors Guide].
- [x] I updated/added relevant documentation (doc comments with `///`).
- [x] All existing and new tests are passing.

If you need help, consider asking for advice on the #hackers-devrel
channel on [Discord].

<!-- Links -->
[Flutter Style Guide]:
https://github.com/flutter/flutter/wiki/Style-guide-for-Flutter-repo
[CLA]: https://cla.developers.google.com/
[Discord]: https://github.com/flutter/flutter/wiki/Chat
[Contributors Guide]:
https://github.com/flutter/samples/blob/main/CONTRIBUTING.md

.github/dependabot.yaml

@@ -57,6 +57,10 @@ updates:
     directory: "code_sharing/shared/"
     schedule:
       interval: "daily"
+  - package-ecosystem: "pub"
+    directory: "deeplink_store_example/"
+    schedule:
+      interval: "daily"
   - package-ecosystem: "pub"
     directory: "desktop_photo_search/fluent_ui/"
     schedule:
@@ -69,10 +73,6 @@ updates:
     directory: "experimental/context_menus/"
     schedule:
       interval: "daily"
-  - package-ecosystem: "pub"
-    directory: "experimental/element_embedding_demo/"
-    schedule:
-      interval: "daily"
   - package-ecosystem: "pub"
     directory: "experimental/federated_plugin/federated_plugin/"
     schedule:
@@ -161,6 +161,10 @@ updates:
     directory: "navigation_and_routing/"
     schedule:
       interval: "daily"
+  - package-ecosystem: "pub"
+    directory: "next_gen_ui_demo/"
+    schedule:
+      interval: "daily"
   - package-ecosystem: "pub"
     directory: "place_tracker/"
     schedule:
@@ -214,11 +218,11 @@ updates:
     schedule:
       interval: "daily"
   - package-ecosystem: "pub"
-    directory: "web_embedding/element_embedding_demo"
+    directory: "web_embedding/element_embedding_demo/"
     schedule:
       interval: "daily"
   - package-ecosystem: "pub"
-    directory: "web_embedding/ng-flutter/flutter"
+    directory: "web_embedding/ng-flutter/flutter/"
     schedule:
       interval: "daily"
   - package-ecosystem: "npm"