fix meter string access

docs/Scripting-Language.md

@@ -582,7 +582,7 @@ SEL:
 `sml(m 2)` = reads serial data received by Meter m into string (if m<0 reads hex values, else asci values)(if defined USE_SML_SCRIPT_CMD)  
 `sml(m 3 hstr)` = inserts SML Hexstring variable hstr as binary to Meter m in Output stream e.g. for special MODBUS cmds, hstr must be a string variable NO string constant (if defined USE_SML_SCRIPT_CMD)  
 `sml[n]` = get value of SML energy register n (if defined USE_SML_SCRIPT_CMD)  
-`smlx[m]` = get value of SML meter string info of meter m (if defined USE_SML_SCRIPT_CMD)  
+`smls[m]` = get value of SML meter string info of meter m (if defined USE_SML_SCRIPT_CMD)  
 `smlv[n]` = get SML decode valid status of line n (1..N), returns 1 if line decoded. n=0 resets all status codes to zero (if defined USE_SML_SCRIPT_CMD)  
 `enrg[n]` = get value of energy register n 0=total, 1..3 voltage of phase 1..3, 4..6 current of phase 1..3, 7..9 power of phase 1..3 (if defined USE_ENERGY_SENSOR)  
 `gjp("host" "path")` = trigger HTTPS JSON page read as used by Tesla Powerwall (if defined SCRIPT_GET_HTTPS_JP)