Fixed missing escape of underline in manual

Author: tpanajott

tex/manual.pdf

@@ -678,7 +678,7 @@
     nspanel/<panel\_name>/status\_report & JSON & JSON payload with current state of the panel. \\ \hline
     nspanel/<panel\_name>/status & JSON & JSON payload with current online/offline state of the panel. \\ \hline
     nspanel/<panel\_name>/command & JSON & JSON payload with a command for the panel to execute. \\ \hline
-    nspanel/<panel\_name>/tft_data & binary & Binary data from a requested section in the TFT file sent from the MQTTManager. \\ \hline
+    nspanel/<panel\_name>/tft\_data & binary & Binary data from a requested section in the TFT file sent from the MQTTManager. \\ \hline
     nspanel/mqttmanager/command & JSON & JSON payload from panel with a command for MQTTManager to perform. \\ \hline
     \end{tabular}}
     \end{table}