Fix typo in README.rst

Fixed a Typo on the 34th line, and added to the 35th so that the Syntax
matches that of the rest of the file.

Closes jp9000/obs-studio#1146
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Internal Server Error - Gitea: Git with a cup of tea
500 Internal Server Error

Gitea Version: 1.28.0+dev-477-g8b6ad49a5f