The ornamental design for a digital pencilcase, as shown and described.
FIG. 1 is a front view of a digital pencil case of the present invention.
FIG. 2 is a back view thereof.
FIG. 3 is a top view thereof.
FIG. 4 is a bottom view thereof.
FIG. 5 is a left view thereof.
FIG. 6 is a right view thereof.
FIG. 7 is a first perspective view thereof; and,
FIG. 8 is a second perspective view thereof.
The broken line showing of certain portions of the digital pencil case is included for the purpose of illustration only and forms no part of the claimed design.