fix typo in systemd service type
fix typo in systemd service type

brain5lug/i2pd,majestrate/i2pd,majestrate/i2pd,PurpleI2P/i2pd,PurpleI2P/i2pd,majestrate/i2pd,majestrate/i2pd,brain5lug/i2pd,PurpleI2P/i2pd,majestrate/i2pd,brain5lug/i2pd,PurpleI2P/i2pd,brain5lug/i2pd