[release-notes] Add two Czech screenshots

[Andre Klapper <aklapper src gnome org>]

commit 8ac8757a1f5f261b9291036e859d29ce6a975106
Author: Andre Klapper <a9016009 gmx de>
Date:   Wed Sep 16 18:56:43 2020 +0200

    Add two Czech screenshots

 help/cs/figures/epiphany.png     | Bin 0 -> 237981 bytes
 help/cs/figures/welcome-tour.png | Bin 0 -> 92461 bytes
 2 files changed, 0 insertions(+), 0 deletions(-)
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diff --git a/help/cs/figures/epiphany.png b/help/cs/figures/epiphany.png
new file mode 100644
index 00000000..73f43a5f
Binary files /dev/null and b/help/cs/figures/epiphany.png differ
diff --git a/help/cs/figures/welcome-tour.png b/help/cs/figures/welcome-tour.png
new file mode 100644
index 00000000..1c9b9d8a
Binary files /dev/null and b/help/cs/figures/welcome-tour.png differ