The ornamental design for an iron-type golf club head, as shown and described.
FIG. 1 illustrates a right, rear perspective view of an iron-type golf club head;
FIG. 2 illustrates a left, rear perspective view of an iron-type golf club head;
FIG. 3 illustrates a bottom perspective view of an iron-type golf club head;
FIG. 4 illustrates a left perspective view of an iron-type golf club head; and,
FIG. 5 illustrates a top view of an iron-type golf club head.
The broken, dashed lines shown in the various figures depicting embodiments of the invention are included for the purpose of illustrating environment and do not form any part of the claimed design.