chore(deps): update container image tccr.io/truecharts/kopia to v0.15.0@915804f (#15312)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [tccr.io/truecharts/kopia](https://togithub.com/truecharts/containers)
| minor | `0.13.0` -> `v0.15.0` |

# Warnings (1)

Please correct - or verify that you can safely ignore - these warnings
before you merge this PR.

- `tccr.io/truecharts/kopia`: Could not determine new digest for update
(docker package tccr.io/truecharts/kopia)

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charts/stable/kopia/Chart.yaml

@@ -1,5 +1,5 @@
 apiVersion: v2
-appVersion: "0.13.0"
+appVersion: v0.15.0
 dependencies:
   - name: common
     repository: https://library-charts.truecharts.org
@@ -19,7 +19,7 @@ sources:
   - https://github.com/truecharts/charts/tree/master/charts/stable/kopia
   - https://kopia.io/docs/installation/#docker-images
   - https://github.com/kopia/kopia
-version: 8.0.0
+version: 8.1.0
 annotations:
   truecharts.org/category: utility
   truecharts.org/SCALE-support: "true"

charts/stable/kopia/values.yaml

@@ -1,6 +1,6 @@
 image:
   repository: tccr.io/truecharts/kopia
-  tag: 0.13.0@sha256:72ed1856efdd443be31e23535d24242056639a387587aa3ade5413e75dad0603
+  tag: v0.15.0@sha256:915804f85364d2bba51248ea6b639d0988933870dc475da71d028aa819ec8649
   pullPolicy: IfNotPresent
 
 service: