chore(deps): update container image ghcr.io/linuxserver/medusa to 1.0.21@4291aa9 by renovate (#25411)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
|
[ghcr.io/linuxserver/medusa](https://togithub.com/linuxserver/docker-medusa/packages)
([source](https://togithub.com/linuxserver/docker-medusa)) | digest |
`b9ec4b9` -> `4291aa9` |

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charts/stable/medusa/Chart.yaml

@@ -38,4 +38,4 @@ sources:
   - https://github.com/truecharts/charts/tree/master/charts/stable/medusa
   - https://pymedusa.com/
 type: application
-version: 12.1.7
+version: 12.1.8

charts/stable/medusa/values.yaml

@@ -1,7 +1,7 @@
 image:
   repository: ghcr.io/linuxserver/medusa
   pullPolicy: IfNotPresent
-  tag: 1.0.21@sha256:b9ec4b96d6e196a292b03c2b1e797bd0baaa9818c1015c9b10f24fcb8d5279fa
+  tag: 1.0.21@sha256:4291aa9b540a875db7c3c1a0d55c679eada775d54d34a2f8e8afcb11c302435c
 service:
   main:
     ports: