chore(helm): update image ghcr.io/linuxserver/calibre digest to dc66964 (#33178)

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 | `13c4fe0` -> `dc66964` |

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

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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: 16.17.3
+version: 16.17.4

charts/stable/calibre/values.yaml

@@ -1,6 +1,6 @@
 image:
   repository: ghcr.io/linuxserver/calibre
-  tag: 7.26.0@sha256:13c4fe0bce1367cb309f74be422d6e38480dee4742a6c3b6c976c3aed3cdad1e
+  tag: 7.26.0@sha256:dc6696456caa980a7c7a5a6654011d0d5c9dd1ff4e8bdf1071f1e3f01da36c7c
   pullPolicy: IfNotPresent
 securityContext:
   container: