docs(stellate-plugin): Fix naming in example

packages/stellate-plugin/src/stellate-plugin.ts

@@ -54,7 +54,7 @@ const StellateOptionsProvider = {
  *            serviceName: 'my-service',
  *            // The API token for the Stellate Purging API. See the "pre-requisites" section above.
  *            apiToken: process.env.STELLATE_PURGE_API_TOKEN,
- *            debugMode: !isProd || process.env.STELLATE_DEBUG_MODE ? true : false,
+ *            devMode: !isProd || process.env.STELLATE_DEBUG_MODE ? true : false,
  *            debugLogging: process.env.STELLATE_DEBUG_MODE ? true : false,
  *            purgeRules: [
  *                ...defaultPurgeRules,