Fix test

Signed-off-by: Eduardo J. Ortega U <5791035+ejortegau@users.noreply.github.com>

go/flags/endtoend/vttablet.txt

@@ -940,7 +940,7 @@ max_rate_approach_threshold: 0.9
  --tx-throttler-default-priority int
  Default priority assigned to queries that lack priority information.
  --tx-throttler-dry-run bool
- If present, the transaction throttler only records metrics about requests received and throttled, but does not actually throttle any requests.
+ If present, the transaction throttler only records metrics about requests received and throttled, but does not actually throttle any requests.
  --tx-throttler-healthcheck-cells value
  Synonym to -tx_throttler_healthcheck_cells
  --tx-throttler-tablet-types value