qt5-webengine: auto updated to 5.15.19-6

It has been built because:
* hubutui has requested to build it
* it failed last time and has been updated
* python-pyqt5-webengine depends on it

Author: lilacbot

archlinuxcn/qt5-webengine/PKGBUILD

@@ -8,7 +8,7 @@
 pkgname=qt5-webengine
 _basever=5.15.18
 pkgver=5.15.19
-pkgrel=5
+pkgrel=6
 arch=('x86_64')
 #url='https://www.qt.io'
 url='https://wiki.qt.io/QtWebEngine/ChromiumVersions'