fix: Modifies Action selector copy in onboarding flow (#24367)

## Description
Minor change to text in onboarding flow.
<img width="986" alt="Screenshot 2023-06-12 at 15 48 37"
src="https://github.com/appsmithorg/appsmith/assets/32433245/bc46e4cd-490a-4434-81ca-dbc2cef4b6c6">

#### PR fixes following issue(s)
Fixes #24252 
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#### Media
> A video or a GIF is preferred. when using Loom, don’t embed because it
looks like it’s a GIF. instead, just link to the video
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#### Type of change
- Bug fix (non-breaking change which fixes an issue)
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## Testing
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#### How Has This Been Tested?
- [x] Manual
- [ ] Jest
- [ ] Cypress
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#### Test Plan
> Add Testsmith test cases links that relate to this PR
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#### Issues raised during DP testing
> Link issues raised during DP testing for better visiblity and tracking
(copy link from comments dropped on this PR)
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## Checklist:
#### Dev activity
- [ ] My code follows the style guidelines of this project
- [ ] I have performed a self-review of my own code
- [ ] I have commented my code, particularly in hard-to-understand areas
- [ ] I have made corresponding changes to the documentation
- [ ] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [ ] New and existing unit tests pass locally with my changes
- [ ] PR is being merged under a feature flag


#### QA activity:
- [ ] [Speedbreak
features](https://github.com/appsmithorg/TestSmith/wiki/Test-plan-implementation#speedbreaker-features-to-consider-for-every-change)
have been covered
- [ ] Test plan covers all impacted features and [areas of
interest](https://github.com/appsmithorg/TestSmith/wiki/Guidelines-for-test-plans/_edit#areas-of-interest)
- [ ] Test plan has been peer reviewed by project stakeholders and other
QA members
- [ ] Manually tested functionality on DP
- [ ] We had an implementation alignment call with stakeholders post QA
Round 2
- [ ] Cypress test cases have been added and approved by SDET/manual QA
- [ ] Added `Test Plan Approved` label after Cypress tests were reviewed
- [ ] Added `Test Plan Approved` label after JUnit tests were reviewed

app/client/src/pages/Editor/GuidedTour/constants.tsx

@@ -521,8 +521,9 @@ export const Steps: StepsType = {
       {
         text: (
           <>
-            Click the <b>+</b> button beside On success, select{" "}
-            <b>Execute a query</b> {"&"} then choose <b>getCustomers</b> Query
+            Expand <b>Callbacks</b> section, click the <b>+</b> button beside{" "}
+            <b>On success</b>, select <b>Execute a query</b> {"&"} then choose{" "}
+            <b>getCustomers</b> Query
           </>
         ),
       },