make a consistent step 11

Author: hectorsector

config.yml

@@ -368,7 +368,7 @@ steps:
 
 # 11
 - title: Validate a learner's PR
-  description: Validate a learner's PR
+  description: Add a gate to determine if the learner took the expected action.
   event: pull_request.synchronize
   actions:
   - type: getFileContents

responses/08.0_validate.md

@@ -4,7 +4,7 @@ The events that can act as triggers help Learning Lab know when something happen
 
 Course authors can use **gates** to be validate the user's completion of a step. A [:book: `gate`](https://github.github.com/learning-lab-equipment/#/actions/gate/) is a Learning Lab action. Gates are conditionals, and they behave much like a conditional in Javascript. Let's add a `gate`, we'll specify its options in a later step.
 
-## Step 9: Add a gate
+## Step 11: Add a gate
 
 Let's now validate the learner's PR. We asked them to title the pull request "Add name to README" so that's what we need to validate against.