added ThinkPenguin TPE-1200 to Supported_Hardware.md

docs/Supported_Hardware.md

@@ -24,6 +24,7 @@ method which is required for the initial install of libreCMC.
 ### ThinkPenguin
 * [TPE-NWIFIROUTER2](/TPE_NWIFIROUTER2.md)
 * [TPE-R1100](/TPE_R1100.md)
+* TPE-R1200
 
 ### Qi-Hardware