chore(helm): update image docker.io/machines/filestash digest to c66254d (#28189)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| docker.io/machines/filestash | digest | `f949d70` -> `c66254d` |

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

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### Configuration

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Automerge - At any time (no schedule defined).

🚦 **Automerge**: Enabled.

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rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update
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charts/stable/filestash/Chart.yaml

@@ -36,4 +36,4 @@ sources:
   - https://hub.docker.com/r/machines/filestash
   - https://www.filestash.app/
 type: application
-version: 8.2.18
+version: 8.2.19

charts/stable/filestash/values.yaml

@@ -1,6 +1,6 @@
 image:
   repository: docker.io/machines/filestash
-  tag: latest@sha256:f949d70a122a9b7280bdf4e662be6d7e89be312a5cb46f74aaa2daafa295a288
+  tag: latest@sha256:c66254dbbe4568e0a2f9a47f11700d34140b7a73e1c9fe23aa0663f782bfc2dd
   pullPolicy: IfNotPresent
 
 securityContext: