chore(helm): update image monica digest to c4c2e7d (#34934)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| monica | digest | `3920f53` -> `c4c2e7d` |

Add the preset `:preserveSemverRanges` to your config if you don't want
to pin your dependencies.

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined),
Automerge - At any time (no schedule defined).

🚦 **Automerge**: Enabled.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.

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

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

This PR has been generated by [Renovate
Bot](https://redirect.github.com/renovatebot/renovate).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOS4yMzguMCIsInVwZGF0ZWRJblZlciI6IjM5LjIzOC4wIiwidGFyZ2V0QnJhbmNoIjoibWFzdGVyIiwibGFiZWxzIjpbImF1dG9tZXJnZSIsInJlbm92YXRlL2NvbnRhaW5lciIsInR5cGUvZGlnZXN0Il19-->

charts/stable/monica/Chart.yaml

@@ -42,5 +42,5 @@ sources:
   - https://github.com/truecharts/charts/tree/master/charts/stable/monica
   - https://hub.docker.com/_/monica
 type: application
-version: 14.13.5
+version: 14.13.6
 

charts/stable/monica/values.yaml

@@ -1,6 +1,6 @@
 image:
   repository: monica
-  tag: 4.1.2@sha256:3920f53250f1a336001359953e93fdab5df1ee1fb399378d5c01c37c02cd28fb
+  tag: 4.1.2@sha256:c4c2e7d5c88c8159dff917a86328500903fe626fe659655b10d2d618e1d2c706
   pullPolicy: IfNotPresent
 service:
   main: