clarify that only limit can be overridden

Author: tmacro

lib/api/apiUtils/rateLimit/config.js

@@ -25,7 +25,7 @@ const { calculateInterval } = require('./gcra');
  *     // Optional: Bucket-level rate limiting configuration
  *     "bucket": {
  *       // Optional: Global default rate limit for all buckets
- *       // Can be overridden per-bucket via PutBucketRateLimit API
+ *       // Limit can be overridden per-bucket via PutBucketRateLimit API
  *       "defaultConfig": {
  *         "requestsPerSecond": {
  *           // Required: Requests per second limit (0 = unlimited)
@@ -51,7 +51,7 @@ const { calculateInterval } = require('./gcra');
  *     // Optional: Account-level rate limiting configuration
  *     "account": {
  *       // Optional: Global default rate limit for all accounts
- *       // Can be overridden per-account via UpdateAccountLimits API
+ *       // Limit can be overridden per-account via UpdateAccountLimits API
  *       "defaultConfig": {
  *         "requestsPerSecond": {
  *           // Required: Requests per second limit (0 = unlimited)