feat(container): update ghcr.io/linuxserver/calibre ( 7.20.0 → 7.21.0 ) (#3698)

Co-authored-by: mahoro-bot[bot] <115426318+mahoro-bot[bot]@users.noreply.github.com>

Author: mahoro-bot[bot]

kubernetes/main/apps/media/calibre/app/helmrelease.yaml

@@ -38,7 +38,7 @@ spec:
           app:
             image:
               repository: ghcr.io/linuxserver/calibre
-              tag: 7.20.0
+              tag: 7.21.0
 
             env:
               TZ: ${TZ}