chore(librespeed): update image ghcr.io/linuxserver/librespeed digest to 66c8afc (#49912)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
|
[ghcr.io/linuxserver/librespeed](https://redirect.github.com/linuxserver/docker-librespeed/packages)
([source](https://redirect.github.com/linuxserver/docker-librespeed)) |
digest | `92ec07a` → `66c8afc` |

---

> [!WARNING]
> Some dependencies could not be looked up. Check the [Dependency
Dashboard](../issues/18710) for more information.

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

---

### Configuration

📅 **Schedule**: (UTC)

- 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:eyJjcmVhdGVkSW5WZXIiOiI0My4xMzAuMSIsInVwZGF0ZWRJblZlciI6IjQzLjEzMC4xIiwidGFyZ2V0QnJhbmNoIjoibWFzdGVyIiwibGFiZWxzIjpbImFwcC9saWJyZXNwZWVkIiwiYXV0b21lcmdlIiwicmVub3ZhdGUvY29udGFpbmVyIiwidHlwZS9kaWdlc3QiXX0=-->

charts/stable/librespeed/Chart.yaml

@@ -36,5 +36,5 @@ sources:
   - https://github.com/librespeed/speedtest
   - https://github.com/trueforge-org/truecharts/tree/master/charts/stable/librespeed
 type: application
-version: 18.7.0
+version: 18.7.1
 

charts/stable/librespeed/values.yaml

@@ -1,7 +1,7 @@
 # yaml-language-server: $schema=./values.schema.json
 image:
   repository: ghcr.io/linuxserver/librespeed
-  tag: 6.1.0@sha256:92ec07a88e654a9a8df6d13319586420af27c973183c28196cf665e41baa1de6
+  tag: 6.1.0@sha256:66c8afc0db38be4fa470e1acdfeaceefd95cd92d513353c71c4a18c12dda75d1
   pullPolicy: IfNotPresent
 service:
   main: