The ornamental design for a packagingbag, as shown and described.
1. Packaging bag
1.1 : Front
1.2 : Top
1.3 : Right
1.4 : Bottom
1.5 : Back
1.6 : Perspective
1.7 : Folding state in use
In the reproductions, the broken lines are for illustrative purposes only and form no part of the claimed design; the dot-dashed thin lines in reproductions 1.1 and 1.7 illustrate a boundary between the claimed portion and the unclaimed portion and form no part of the claimed design; the long dash, short space thick lines and the thick solid lines in reproduction 1.1 represent guidelines for folding and are parts of the claimed design; reproduction 1.7 shows a folding state in use of the packaging bag.