The ornamental design for a transport-container lock, as shown and described.
FIG. 1 is a front perspective view of a transport-container lock.
FIG. 2 is a front view of the transport-container lock.
FIG. 3 is a rear view of the transport-container lock.
FIG. 4 is a right-side view of the transport-container lock.
FIG. 5 is a left-side view of the transport-container lock.
FIG. 6 is a top view of the transport-container lock.
FIG. 7 is a bottom view of the transport-container lock; and,
FIG. 8 is a rear perspective view of the transport-container lock.
The broken lines shown form no part of the claimed design. The broken lines in FIG. 1 illustrate environment only and form no part of the claimed design. None of the broken lines form any part of the claimed design.