chore(helm): update image docker.io/machines/filestash digest to 49f08e5 (#28306)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| docker.io/machines/filestash | digest | `d76f85c` -> `49f08e5` |

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:eyJjcmVhdGVkSW5WZXIiOiIzOC4xMzAuMyIsInVwZGF0ZWRJblZlciI6IjM4LjEzMC4zIiwidGFyZ2V0QnJhbmNoIjoibWFzdGVyIiwibGFiZWxzIjpbImF1dG9tZXJnZSIsInJlbm92YXRlL2NvbnRhaW5lciIsInR5cGUvZGlnZXN0Il19-->

charts/stable/filestash/Chart.yaml

@@ -36,4 +36,4 @@ sources:
   - https://hub.docker.com/r/machines/filestash
   - https://www.filestash.app/
 type: application
-version: 8.2.20
+version: 8.2.21

charts/stable/filestash/values.yaml

@@ -1,6 +1,6 @@
 image:
   repository: docker.io/machines/filestash
-  tag: latest@sha256:d76f85c395b9cd0a825a2c414f62dc1a537a9974e3f380709471b4da86794d3f
+  tag: latest@sha256:49f08e5298478e3b39f18f4f5f9faa8174a151b1b7fb95b885ff5e65f35a7638
   pullPolicy: IfNotPresent
 
 securityContext: