chore(deps): bump androidx.navigation:navigation-testing

Bumps androidx.navigation:navigation-testing from 2.8.6 to 2.8.7.

---
updated-dependencies:
- dependency-name: androidx.navigation:navigation-testing
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -35,7 +35,7 @@ loggingInterceptor = "4.12.0"
 navigationDynamicFeaturesFragment = "2.8.7"
 navigationFragmentKtx = "2.8.6"
 navigationSafeArgsGradlePlugin = "2.8.7"
-navigationTesting = "2.8.6"
+navigationTesting = "2.8.7"
 navigationUiKtx = "2.8.6"
 okhttp = "5.0.0-alpha.14"
 orchestrator = "1.5.1"