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

Bumps androidx.navigation:navigation-testing from 2.8.7 to 2.8.8.

---
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

@@ -17,7 +17,7 @@ lifecycle-viewmodel-ktx = "2.8.7"
 # Navigation
 navigation-fragment-ktx = "2.8.7"
 navigation-ui-ktx = "2.8.7"
-navigation-testing = "2.8.7"
+navigation-testing = "2.8.8"
 
 # Work Manager
 work-runtime-ktx = "2.10.0"