srcpkgs: update maintainer email.

[ci skip]

srcpkgs/srain/template

@@ -9,7 +9,7 @@ hostmakedepends="pkg-config gettext glib-devel"
 makedepends="glib-devel gtk+3-devel libconfig-devel libressl-devel
  libsecret-devel libsoup-devel"
 short_desc="Modern IRC client written in GTK"
-maintainer="avoidr <avoidr@firemail.cc>"
+maintainer="avoidr <avoidr@posteo.de>"
 license="GPL-3.0-only"
 homepage="https://srain.im/"
 distfiles="https://github.com/SrainApp/srain/archive/${version}.tar.gz"

srcpkgs/utox/template

@@ -10,7 +10,7 @@ makedepends="check-devel dbus-devel filter_audio-devel fontconfig-devel
  libXrender-devel libopenal-devel libsodium-devel libvpx-devel opus-devel
  toxcore-devel v4l-utils-devel"
 short_desc="Lightweight Tox instant messenger client written in C"
-maintainer="avoidr <avoidr@firemail.cc>"
+maintainer="avoidr <avoidr@posteo.de>"
 license="MIT"
 homepage="https://github.com/uTox/uTox/"
 distfiles="https://github.com/uTox/uTox/releases/download/v${version}/uTox-${version}-full.tar.gz"