The ornamental design for a projector mount, as shown and described.
FIG. 1 is a top plan view of a projector mount showing my new design;
FIG. 2 is a bottom plan view thereof;
FIG. 3 is a left side view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a front elevational view thereof;
FIG. 6 is a rear elevational view thereof;
FIG. 7 is a perspective view thereof;
FIG. 8 is an enlarged, perspective, view thereof, with portion of the projector mount shown with symbolic breaks in its length and any portion between the break lines forms no part of the claimed design; and,
FIG. 9 is a perspective view thereof with its environment shown in broken lines which form no part of the claimed design.