## Description
Updates the error message assertion in DS_Bug26941_Spec.ts
## Automation
/ok-to-test tags="@tag.Datasource, @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/13963497727>
> Commit: 143ec48d157ff1e05479106b31bf9093361eeb6f
> <a
href="https://internal.appsmith.com/app/cypress-dashboard/rundetails-65890b3c81d7400d08fa9ee5?branch=master&workflowId=13963497727&attempt=1"
target="_blank">Cypress dashboard</a>.
> Tags: `@tag.Datasource, @tag.Sanity`
> Spec:
> <hr>Thu, 20 Mar 2025 07:49:21 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
- **Tests**
- Enhanced automated test routines to improve the monitoring and
verification of API error scenarios for increased reliability.
- Added additional logging and assertions to capture detailed API
response information during error handling.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
c6460d359b