adapt layout to one sentence per line so the strings for i18n are complete

The sentences should be one per line, otherwise the i18n plugin does not work well and creates separated strings that make it hard to translate.

With this change we get two strings:

msgid ""
"To do this, Snowflake uses a technology called WebRTC, which is commonly "
"employed by videoconferencing software."
msgstr ""

msgid ""
"This also helps mask your use of Tor from censors by making it appear as "
"though you’re placing an audio or video call instead, for example."
msgstr ""

Instead of these three:

msgid ""
"To do this, Snowflake uses a technology called WebRTC, which is commonly "
"employed by videoconferencing"
msgstr ""

msgid ""
"software. This also helps mask your use of Tor from censors by making it "
"appear as though you’re placing an"
msgstr ""

msgid "audio or video call instead, for example."
msgstr ""