webkitgtk: bump to version 2.34.6

This is a bug fix release in the stable 2.34 series.

* Fix accessibility not working when the Bubblewrap sandbox is enabled.
* Fix rendering of scrollbars when overlay scrollbars are disabled.
* Fix the build when the X11 support is disabled.
* Fix the build in a number of situations where the main OpenGL library
  is not called libGL or libgl, as is the case on systems that use
  libglvnd.
* Fix several crashes and rendering issues.

Annoucement:

* https://webkitgtk.org/2022/02/17/webkitgtk2.34.6-released.html

WebKitGTK Advisory URL:

* https://webkitgtk.org/security/WSA-2022-0003.html

recipes-browser/webkitgtk/webkitgtk_2.34.5.bb → recipes-browser/webkitgtk/webkitgtk_2.34.6.bb

@@ -16,7 +16,7 @@ FILESEXTRAPATHS:prepend := "${THISDIR}/${PN}:"
 SRC_URI = " \
     https://www.webkitgtk.org/releases/webkitgtk-${PV}.tar.xz;name=tarball \
 "
-SRC_URI[tarball.sha256sum] = "68930643af7a47a3af05f46d66e784422433753dab335d3282f319a85a5629b4"
+SRC_URI[tarball.sha256sum] = "6bc8fd034aad0432a2459ce4fc7ee25ad65a4924c618bf8d93b52b0c1a84c1f6"
 
 RRECOMMENDS:${PN} = "${PN}-bin \
                      ca-certificates \