security/doas: update to 6.3p10

This is a minor upgrade which includes two fixes for the doasedit utility,
allowing it to work with files containing special characters and including
more error checking.

Upstream release announcement:
https://github.com/slicer69/doas/releases/tag/6.3p10

PR: 278683
MFH: 2024Q2
(cherry picked from commit fca92006e50a6935269a4d2a7bc430c884d7d735)