Criticality badge medium impact bug / typo fixed (#213456)

## Summary

This PR fixes the colour on medium impact showing on asset criticality
badges across alerts table.


### Reproduce Bug
1. Kibana latest version 
2. Generate entity store data 
3. navigate to alerts page, with alerts generated 
4. Look at host criticality and user criticality columns
5. Observe that, the badges for these columns are transparent. Hover
over to see details.

### Screenshot: Bug


![image](https://github.com/user-attachments/assets/79796b92-18e8-4f58-b781-f82c0aeea463)


### Testing Fix 
Same steps as above, but with this PR, observe that the badged for
medium impact now have the relevent colouring enabled.

### Screenshots: Fix in Place

Host Criticality, Dark Theme             |  User Criticality, Dark Theme
:-------------------------:|:-------------------------:

!![image](https://github.com/user-attachments/assets/34ae6647-8333-4dd6-a3e7-24389ce4f3ea)
|
![image](https://github.com/user-attachments/assets/63045bdb-52a6-433b-b941-8c04e6242768)

Host Criticality, Light Theme | User Criticality, Light Theme
:-------------------------:|:-------------------------:

!![image](https://github.com/user-attachments/assets/8a1e6410-c565-4fc1-9829-bb4144f08cc8)
|
![image](https://github.com/user-attachments/assets/e8af0152-bfa3-4296-88ba-25fdf2624f38)

x-pack/solutions/security/plugins/security_solution/public/entity_analytics/components/asset_criticality/asset_criticality_badge.tsx

@@ -14,7 +14,7 @@ import type { CriticalityLevelWithUnassigned } from '../../../../common/entity_a
 export const CRITICALITY_LEVEL_COLOR: Record<CriticalityLevelWithUnassigned, string> = {
   extreme_impact: '#E7664C',
   high_impact: '#DA8B45',
-  medium_impact: 'D6BF57',
+  medium_impact: '#D6BF57',
   low_impact: '#54B399',
   unassigned: euiLightVars.euiColorMediumShade,
 };