fix: update telemetry docs (#8295)

Author: RomneyDa

docs/telemetry.mdx

@@ -36,15 +36,15 @@ Alternatively in VS Code, you can disable telemetry through your VS Code setting
 
 ### CLI
 
-For `cn`, the Continue CLI, set the environment variable `CONTINUE_CLI_ENABLE_TELEMETRY=0` before running commands:
+For `cn`, the Continue CLI, set the environment variable `CONTINUE_ALLOW_ANONYMOUS_TELEMETRY=0` before running commands:
 
 ```bash
-export CONTINUE_CLI_ENABLE_TELEMETRY=0
+export CONTINUE_ALLOW_ANONYMOUS_TELEMETRY=0
 cn <your prompt>
 ```
 
 Or run it inline:
 
 ```bash
-CONTINUE_CLI_ENABLE_TELEMETRY=0 cn <your prompt>
+CONTINUE_ALLOW_ANONYMOUS_TELEMETRY=0 cn <your prompt>
 ```