add prefix to telemetry env (#109)

Author: adhami3310

.github/workflows/check_export.yml

@@ -1,7 +1,7 @@
 name: check-export
 env:
   REFLEX_DEP: "git+https://github.com/reflex-dev/reflex.git@main"
-  TELEMETRY_ENABLED: false
+  REFLEX_TELEMETRY_ENABLED: false
 on:
   push:
     branches: [main]