chore(container): update image ghcr.io/linuxserver/calibre to 4f7c21a by renovate (#27773)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
|
[ghcr.io/linuxserver/calibre](https://redirect.github.com/linuxserver/docker-calibre/packages)
([source](https://redirect.github.com/linuxserver/docker-calibre)) |
digest | `1029032` -> `4f7c21a` |

---

> [!WARNING]
> Some dependencies could not be looked up. Check the Dependency
Dashboard for more information.

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.

---

- [x] <!-- 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:eyJjcmVhdGVkSW5WZXIiOiIzOC4xMjQuMSIsInVwZGF0ZWRJblZlciI6IjM4LjEyNC4xIiwidGFyZ2V0QnJhbmNoIjoibWFzdGVyIiwibGFiZWxzIjpbInJlbm92YXRlL2NvbnRhaW5lciIsInR5cGUvZGlnZXN0Il19-->

Co-authored-by: alfi0812 <43101280+alfi0812@users.noreply.github.com>

charts/stable/calibre/Chart.yaml

@@ -32,4 +32,4 @@ sources:
   - https://github.com/kovidgoyal/calibre/
   - https://github.com/truecharts/charts/tree/master/charts/stable/calibre
 type: application
-version: 16.8.2
+version: 16.8.3

charts/stable/calibre/values.yaml

@@ -1,6 +1,6 @@
 image:
   repository: ghcr.io/linuxserver/calibre
-  tag: 7.19.0@sha256:102903294d24ec3d54f9759527e72426cbb36fc4edd5b69618680f7e8fe8e713
+  tag: 7.19.0@sha256:4f7c21af85f8fe8d436fbff48a02ddbf4370c137beedbbbf71825e5aa0a58bc7
   pullPolicy: IfNotPresent
 securityContext:
   container: