Add LINK Dallas (#499)

systems.csv

@@ -642,6 +642,7 @@ US,LINK Alexandria,"Alexandria, VA",Link_Alexandria,https://www.link.city,https:
 US,LINK Arlington,"Arlington, VA",Link_Arlington,https://www.link.city,https://mds.linkyour.city/gbfs/us_va_arlington/gbfs.json,https://gbfs-validator.netlify.app/?url=https%3A%2F%2Fmds.linkyour.city%2Fgbfs%2Fus_va_arlington%2Fgbfs.json
 US,LINK Baltimore,"Baltimore, MD",Link_Baltimore,https://www.link.city,https://mds.linkyour.city/gbfs/us_md_baltimore/gbfs.json,https://gbfs-validator.netlify.app/?url=https%3A%2F%2Fmds.linkyour.city%2Fgbfs%2Fus_md_baltimore%2Fgbfs.json
 US,LINK Chicago,"Chicago, IL",Link_Chicago,https://www.link.city,https://mds.linkyour.city/gbfs/us_il_chicago/gbfs.json,https://gbfs-validator.netlify.app/?url=https%3A%2F%2Fmds.linkyour.city%2Fgbfs%2Fus_il_chicago%2Fgbfs.json
+US,LINK Dallas,"Dallas,TX",Link_Dallas, https:www.link.city,https://mds.linkyour.city/gbfs/us_tx_dallas/gbfs.json,https://gbfs-validator.netlify.app/?url=https%3A%2F%2Fmds.linkyour.city%2Fgbfs%2Fus_tx_dallas%2Fgbfs.json
 US,LINK Los Angeles,"Los Angeles, CA",Link_Los_Angeles,https://www.link.city,https://mds.linkyour.city/gbfs/us_ca_los_angeles/gbfs.json,https://gbfs-validator.netlify.app/?url=https%3A%2F%2Fmds.linkyour.city%2Fgbfs%2Fus_ca_los_angeles%2Fgbfs.json
 US,LINK Manhattan,"Manhattan, KS",Link_Manhattan,https://www.link.city,https://mds.linkyour.city/gbfs/us_ks_manhattan/gbfs.json,https://gbfs-validator.netlify.app/?url=https%3A%2F%2Fmds.linkyour.city%2Fgbfs%2Fus_ks_manhattan%2Fgbfs.json
 US,LINK Oakland,"Oakland, CA",Link_Oakland,https://www.link.city,https://mds.linkyour.city/gbfs/us_ca_oakland/gbfs.json,https://gbfs-validator.netlify.app/?url=https%3A%2F%2Fmds.linkyour.city%2Fgbfs%2Fus_ca_oakland%2Fgbfs.json