fix(deps): update androidx.navigation to v2.8.4

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
androidx.navigation:navigation-ui-ktx (source)	2.8.3 -> 2.8.4
androidx.navigation:navigation-fragment-ktx (source)	2.8.3 -> 2.8.4

---

Configuration

📅 Schedule: Branch creation - "every weekend" (UTC), Automerge - At any time (no schedule defined).

🚦 Automerge: Enabled.

♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about these updates again.

---

• [ ] If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.