chore(helm): update image docker.io/serverlein/tsn-ranksystem-webserver digest to a1976b0 (#32126)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| docker.io/serverlein/tsn-ranksystem-webserver | digest | `02ebf12` ->
`a1976b0` |

---

> [!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.

---

- [ ] <!-- 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:eyJjcmVhdGVkSW5WZXIiOiIzOS4xNjQuMCIsInVwZGF0ZWRJblZlciI6IjM5LjE2NC4wIiwidGFyZ2V0QnJhbmNoIjoibWFzdGVyIiwibGFiZWxzIjpbImF1dG9tZXJnZSIsInJlbm92YXRlL2NvbnRhaW5lciIsInR5cGUvZGlnZXN0Il19-->

charts/stable/tsn-ranksystem/Chart.yaml

@@ -43,4 +43,4 @@ sources:
   - https://hub.docker.com/r/serverlein/tsn-ranksystem-webserver
   - https://ts-ranksystem.com/
 type: application
-version: 3.12.3
+version: 3.12.4

charts/stable/tsn-ranksystem/values.yaml

@@ -1,7 +1,7 @@
 image:
   repository: docker.io/serverlein/tsn-ranksystem-webserver
   pullPolicy: IfNotPresent
-  tag: latest@sha256:02ebf124c82cce35520f3c9d00e1581afeb5ce796fd83d05200ca854ad76d674
+  tag: latest@sha256:a1976b0a832694586ff7454b58a5b7218f5af58def1cbfb8317dce1a1de47bc0
 
 securityContext:
   container: