package/wpewebkit: security bump to version 2.34.6

This brings the package two minor releases forward, which provides fixes
for CVE-2022-22589, CVE-2022-22590, CVE-2022-22592, and CVE-2022-22620.
Release notes can be found at:

  https://wpewebkit.org/release/wpewebkit-2.34.5.html
  https://wpewebkit.org/release/wpewebkit-2.34.6.html

The security advisories covering this update are available at:

  https://wpewebkit.org/security/WSA-2022-0002.html
  https://wpewebkit.org/security/WSA-2022-0003.html



Signed-off-by: Adrian Perez de Castro <aperez@igalia.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>