The ornamental design for a packagingbag, as shown and described.
FIG. 1 is a front elevational view of the packaging bag;
FIG. 2 is a right side elevational view thereof (the left side elevational view is identical);
FIG. 3 is a top plan view thereof;
FIG. 4 is a bottom plan view thereof;
FIG. 5 is a rear elevational view thereof;
FIG. 6 is a front perspective view thereof;
FIG. 7 is a sectional view thereof taken along line 7-7 of FIG. 1; and,
FIG. 8 is a sectional view thereof taken along line 8-8 of FIG. 1.
The broken lines showing of structural feature is indeed for the purpose of illustrating non-claimed subject matter and forms no part of the claimed design.