Write the busybox image without the library/ namespace

docker.io/busybox and docker.io/library/busybox resolve to the same image on
Docker Hub, and the short form is the spelling the rest of the fleet will use
when the remaining unqualified official images (paperless-ngx, matrix-synapse,
minecraft-server) are qualified in the #84 follow-up.

Verified: the rendered output differs in exactly this one line, and a Renovate
lookup against the real chart files (44.41.0, official container, dry-run
lookup) still extracts all ten images through helm-values with no skipReason
and no warnings - docker.io/busybox included, whose candidate list stays empty
because 1.38.0 is current.

freesailarr/values.yaml

@@ -245,7 +245,7 @@ qbittorrent:
     # Auxiliary busybox image for the init container, pinned here like every
     # other image in this chart and proposed by Renovate the same way.
     image:
-      repository: docker.io/library/busybox
+      repository: docker.io/busybox
       tag: "1.38.0"
     resources:
       limitFactor: 3