www/qt5-webengine: Bump PORTREVISION after fa01e117e24f

The port archivers/snappy was updated to version 1.2.0 via fa01e117e24f
but there was no PORTREVISION bump afterwards for qt5-webengine, which
uses archivers/snappy.

This led to the following runtime error as soon as consumers (e.g.
x11-fm/konqueror) using qt5-webengine were started:

ld-elf.so.1: /usr/local/lib/qt5/libQt5WebEngineCore.so.5: Undefined symbol "_ZN6snappy11RawCompressEPKcmPcPm"

Remedy the issue by bumping PORTREVISION to force a rebuild against the
new version of archivers/snappy.

PR: 278633
Reported by: Graham Perrin
MFH: 2024Q2
With hat: kde