fix: Update WarningIcon to use correct warning symbol

[YadavAkhileshh]

Description

This PR fixes the incorrect WarningIcon that was displaying a checkmark instead of a warning symbol.

Changes Made

• Updated the WarningIcon SVG path to show the correct warning triangle icon
• The icon now displays a triangle with an exclamation mark, matching standard warning icon design

Before & After

Before: Circle with checkmark ✅ (looked like a success icon)
After: Triangle with exclamation mark ⚠️ (proper warning icon)

Issue

Fixes #1193

Testing

• Build completed successfully
• All tests passed

Checklist

• Code follows project style guidelines
• Changes are minimal and focused on the issue
• All tests pass
• Commit is signed off

Notes for Reviewers

Signed commits

• Yes, I signed my commits.

[YadavAkhileshh]

@kishore08-07 Please take a look at my PR

[Rajesh-Nagarajan-11]

Did you check with meshery / layer5 website with icon ? any visuals will be helpfull @YadavAkhileshh

[YadavAkhileshh]

@Rajesh-Nagarajan-11 No, I didn't check the Meshery/Layer5 site. I used the standard Material-UI Warning icon SVG path since you mentioned sistent uses MUI. The path I used is the official Material Design warning triangle icon.

Should I verify it on the Meshery site first? If so, where can I find this icon being used?