Fix modulo condition and newline escape charachter

[cosmoqain459]

I made two changes in the Reddit data streaming.pynb files.
Both are logical errors.

1.% 1 should be % 5 — len(detected_posts) % 1 == 0 is always True, so it saves after every post instead of every 5 as intended.
2./n should be \n — The two print statements at the end use forward slashes (/n) instead of backslashes (\n), so the newlines won't actually render.