chore(seafile): update image docker.io/seafileltd/seafile-mc digest to 6a47d79 (#43431)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| docker.io/seafileltd/seafile-mc | digest | `29ce625` -> `6a47d79` |

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charts/stable/seafile/Chart.yaml

@@ -52,5 +52,5 @@ sources:
   - https://hub.docker.com/r/seafileltd/seafile-mc
   - https://seafile.com
 type: application
-version: 12.17.7
+version: 12.17.8
 

charts/stable/seafile/values.yaml

@@ -1,6 +1,6 @@
 image:
   repository: docker.io/seafileltd/seafile-mc
-  tag: 13.0.15@sha256:29ce625c5bedc9b42cf1f012ef157dd11e2d28529842c36c6007ab77ec060988
+  tag: 13.0.15@sha256:6a47d79613a2e3a31680f8ed42bea9e0ecc2df0f17e00f2e75f38489fa1d132e
   pullPolicy: IfNotPresent
 
 service: