Improve ref. point label of multimeter documentation

Co-authored-by: SX <[email protected]>

technic/doc/tools.md

@@ -50,7 +50,7 @@ This electric tool is used for quick lookup at an electric network. It works by
 
 | Property         | Example Value | Unit       | Meaning                                                       |
 |------------------|---------------|------------|---------------------------------------------------------------|
-| Ref. point       | 61, 19, 62    | Coordinate | The location of the switching station attached to the network |
+| Ref. point       | 61, 19, 62    | Coordinate | The location of the cable below the switching station that initially triggered initialization of this network |
 | Activated        | yes           | active     | The current state of the network                              |
 | Timeout          | 1800.0        | s          | Time remaining, in seconds, before the network will shut down |
 | Lag              | 0.60          | ms         | The lag generated by the network                              |