fix(scripts): fix typo in telemetry log server script (#2561)

This was missed in 5f43eb6 because the script was
being introduced at the same time.

Author: addaleax

scripts/logserver.js

@@ -1,6 +1,6 @@
 // Simple HTTP server that logs out all requests it receives and just
 // replies with 200 Ok. This is very useful when debugging telemetry:
-// env HARDRON_METRICS_SEGMENT_API_KEY='ignore' HARDRON_METRICS_SEGMENT_HOST='http://localhost:8000' npm start
+// env HADRON_METRICS_SEGMENT_API_KEY='ignore' HADRON_METRICS_SEGMENT_HOST='http://localhost:8000' npm start
 const http = require('http');
 
 http.createServer((req, res) => {