chore(kdenlive): update image lscr.io/linuxserver/kdenlive digest to 15bd8c4 (#44150)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| lscr.io/linuxserver/kdenlive | digest | `16bc51e` -> `15bd8c4` |

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charts/stable/kdenlive/Chart.yaml

@@ -40,5 +40,5 @@ sources:
   - https://github.com/trueforge-org/truecharts/tree/master/charts/stable/kdenlive
   - https://kdenlive.org/
 type: application
-version: 8.13.17
+version: 8.13.18
 

charts/stable/kdenlive/values.yaml

@@ -1,7 +1,7 @@
 image:
   pullPolicy: IfNotPresent
   repository: lscr.io/linuxserver/kdenlive
-  tag: latest@sha256:16bc51e7821497460ac2c3a9f649ad3fa28715857ae7b973c8cd43d1f2c8f562
+  tag: latest@sha256:15bd8c4f1199d716d0b6747ab95a8914599766b6eb25a01dcdfac6cc05817d8e
 persistence:
   config:
     enabled: true