Update specimen text for Church Slavonic

[typiconman]

The specimen text for Church Slavonic (Cyrillic) was taken from Omniglot and has a typo. See here.

Let's fix the typo. The specimen text should be like this:

Вьси бо людиѥ родѧтъ сѧ свободьни и равьни въ достоиньствѣ и ꙁаконѣ. Они сѫтъ одарѥни раꙁоумомь и съвѣдиѭ и дължьни сѫтъ дѣꙗти въ доусѣ братьства.

While we're at it, consider that this text is for Old Church Slavonic, but with the addition of a set of Church Slavonic fonts to Google Fonts (see #2403), the majority of fonts are designed for modern Church Slavonic. So I would suggest updating the specimen text to reflect modern Church Slavonic. It would also demonstrate the support of diacritical marks in the fonts. Here's what the text would look like:

Вси́ бо лю́дїе родѧ́тсѧ свобо́дни и҆ ра́вни въ досто́инствѣ и҆ зако́нѣ. Ѻ҆нѝ сꙋ́ть ѡ҆дарова́ни ра́зꙋмомъ и҆ со́вѣстїю и҆ до́лжни сꙋ́ть дѣ́ѧти въ дꙋ́сѣ бра́тства.

Of the fonts, only Shafarik is designed for Old Church Slavonic, but there is no way that I can see in Google Fonts to distinguish between Old Church Slavonic and modern Church Slavonic.