fix: fix highlight position (#37011)

## Description


Fixes #37004

> [!WARNING]  
> _If no issue exists, please create an issue first, and check with the
maintainers if the issue is valid._

## Automation

/ok-to-test tags="@tag.Sanity"

### 🔍 Cypress test results
<!-- This is an auto-generated comment: Cypress test results  -->
> [!TIP]
> 🟢 🟢 🟢 All cypress tests have passed! 🎉 🎉 🎉
> Workflow run:
<https://github.com/appsmithorg/appsmith/actions/runs/11478380759>
> Commit: 5aaf9dffd402032da789f495279440f422dba795
> <a
href="https://internal.appsmith.com/app/cypress-dashboard/rundetails-65890b3c81d7400d08fa9ee5?branch=master&workflowId=11478380759&attempt=1"
target="_blank">Cypress dashboard</a>.
> Tags: `@tag.Sanity`
> Spec:
> <hr>Wed, 23 Oct 2024 11:32:33 UTC
<!-- end of auto-generated comment: Cypress test results  -->


## Communication
Should the DevRel and Marketing teams inform users about this change?
- [ ] Yes
- [ ] No


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **Style**
- Updated the `.anvil-canvas` class to include a new `position:
relative;` property, enhancing the layout and positioning context of the
canvas element.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

app/client/src/layoutSystems/anvil/viewer/canvas/styles.module.css

@@ -1,4 +1,5 @@
 .anvil-canvas {
+  position: relative;
   container-type: inline-size;
   width: 100%;
   height: 100%;