Onboarding: Update site suggestion for UK and Ireland (#7031)

Task/Issue URL:
https://app.asana.com/1/137249556945/task/1211642170473305?focus=true

### Description
Update second site suggestion for UK and Ireland

### Steps to test this PR

_UK_
- [x] Set device to en-GB
- [x] Fresh install
- [x] Go through onboarding
- [x] In site suggestions step make sure the second option is
`uk.yahoo.com`
- [x] Tap on it
- [x] Check it redirects correctly to `uk.yahoo.com`

_Ireland_
- [x] Set device to en-IE
- [x] Fresh install
- [x] Go through onboarding
- [x] In site suggestions step make sure the second option is
`uk.yahoo.com`
- [x] Tap on it
- [x] Check it redirects correctly to `uk.yahoo.com`

### UI changes
| Before  | After |
| ------ | ----- |
<img width="357" height="807" alt="Screenshot 2025-10-29 at 23 46 18"
src="https://github.com/user-attachments/assets/6e31b78a-9802-42bd-a6ff-ba32fbf0ec66"
/>|<img width="380" height="842" alt="Screenshot 2025-10-30 at 12 32 34"
src="https://github.com/user-attachments/assets/2225b907-07b4-410e-b581-753a78882bec"
/>|

Author: nalcalag

app/src/main/java/com/duckduckgo/app/onboarding/store/OnboardingStoreImpl.kt

@@ -85,7 +85,7 @@ class OnboardingStoreImpl @Inject constructor(
 
             "GB" -> {
                 site1 = "skysports.com "
-                site2 = "bbc.co.uk"
+                site2 = "uk.yahoo.com"
                 site3 = "ebay.com"
                 site4Query = "britannica.com/animal/duck"
             }
@@ -127,7 +127,7 @@ class OnboardingStoreImpl @Inject constructor(
 
             "IE" -> {
                 site1 = "skysports.com"
-                site2 = "bbc.co.uk "
+                site2 = "uk.yahoo.com"
                 site3 = "ebay.com"
                 site4Query = "britannica.com/animal/duck"
             }