💚 Update PR description editing action (#3558)
💚 Update PR description editing action (#3558)

Switch to upstream and use a more recent version.
Fixes failure to edit on empty descriptions.

Signed-off-by: Alexandre Franke <0723c2bfdbf7f51184fa182c35a5f15b715177de@matrix.org>
matrix-org/matrix-doc,matrix-org/matrix-doc,matrix-org/matrix-doc,matrix-org/matrix-doc