chore(deps): bump mockito from 5.5.1 to 5.6.1

Bumps [mockito](https://github.com/dart-lang/mockito) from 5.5.1 to 5.6.1.
- [Release notes](https://github.com/dart-lang/mockito/releases)
- [Changelog](https://github.com/dart-lang/mockito/blob/master/CHANGELOG.md)
- [Commits](dart-lang/mockito@v5.5.1...v5.6.1)

---
updated-dependencies:
- dependency-name: mockito
  dependency-version: 5.6.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

pubspec.lock

@@ -277,10 +277,10 @@ packages:
     dependency: "direct dev"
     description:
       name: mockito
-      sha256: "4feb43bc4eb6c03e832f5fcd637d1abb44b98f9cfa245c58e27382f58859f8f6"
+      sha256: dac24d461418d363778d53198d9ac0510b9d073869f078450f195766ec48d05e
       url: "https://pub.dev"
     source: hosted
-    version: "5.5.1"
+    version: "5.6.1"
   node_preamble:
     dependency: transitive
     description: