The ornamental design for a firesuppressionnozzle, as shown and described.
FIG. 1 is a perspective view of a new design for a fire suppression nozzle;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side thereof;
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.
The portions depicted in broken lines depict illustrative environmental subject matter only and form no part of the claimed design. The thin solid lines illustrate surface contour and form no part of the claimed design.