chore(deps): update ghcr.io/flexget/flexget docker tag to v3.15.0 (#2098)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

kubernetes/download/flexget/values.yaml

@@ -1,6 +1,6 @@
 image:
   repository: "ghcr.io/flexget/flexget"
-  tag: "3.14.4@sha256:f0f40856e51055d092a71c6eb4a318f3a54d6ff27ae87b52bac7e22fc17c4313"
+  tag: "3.15.0@sha256:a15bf2af75b544563a64b651336d5d1d6296f8ba1b79ebb03eddf566b8d61b8a"
 
 ports: 
 - name: main