Add note about WiFi to help text of WiFi-AP scripts (#1817)

Related #131, subtask (g).

As the WiFi-AP scripts [overwrite the `wpa_supplicant.conf`
file](https://github.com/tiny-pilot/tinypilot/blob/6f37e68acbb729d82b76ed0dad0f67763926f29d/debian-pkg/opt/tinypilot-privileged/scripts/enable-wifi-ap#L160-L172),
we have to extend the note in the help text that running the scripts
will clear any WiFi settings.
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Co-authored-by: Jan Heuermann <[email protected]>

debian-pkg/opt/tinypilot-privileged/scripts/disable-wifi-ap

@@ -25,8 +25,8 @@ Disable TinyPilot WiFi access point.
   --help  Display this help and exit.
 
 Note: Running this script will clear any potentially existing custom static IP
-      configuration that might have been added previously by the set-static-ip
-      script.
+      configuration and also any potentially existing WiFi settings that might
+      have been set up previously.
 
 EOF
 }

debian-pkg/opt/tinypilot-privileged/scripts/enable-wifi-ap

@@ -35,8 +35,8 @@ Enable TinyPilot WiFi access point.
                               Defaults to: ${NETWORK_COUNTRY}
 
 Note: Running this script will clear any potentially existing custom static IP
-      configuration that might have been added previously by the set-static-ip
-      script.
+      configuration and also any potentially existing WiFi settings that might
+      have been set up previously.
 
 EOF
 }