The ornamental design for a latch, as shown and described.
FIG. 1 is a perspective view of a latch;
FIG. 2 is a perspective view of the latch positioned on an illustrative electrical connector, the electrical connector is shown in broken line and is not claimed;
FIG. 3 is a top view of the latch of FIG. 1;
FIG. 4 is a front view of the latch of FIG. 1;
FIG. 5 is a back view of the latch of FIG. 1;
FIG. 6 is a right side view of the latch of FIG. 1; and,
FIG. 7 is a left side view of the latch of FIG. 1.
The broken lines indicates unclaimed portions and forms no part of the claimed design.