chore(helm): update image machines/filestash digest to c5c425d (#28008)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| machines/filestash | digest | `cd548b9` -> `c5c425d` |

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

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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: 8.2.14
+version: 8.2.15

charts/stable/filestash/values.yaml

@@ -1,6 +1,6 @@
 image:
   repository: machines/filestash
-  tag: latest@sha256:cd548b933a4cd63fe88de5aa5d6a80a026632653ca89a4237e1139604bd5dbfe
+  tag: latest@sha256:c5c425d6df3b9999a3777a4c227e9c0d5103166c1789f4e2dd8ed83c4120f2f0
   pullPolicy: IfNotPresent
 
 securityContext: