Improve some Polish translations (#6585)

Task/Issue URL:
https://app.asana.com/1/137249556945/project/1202552961248957/task/1211047862448590?focus=true

### Description
Update a couple of translations in Polish after review

### Steps to test this PR 
- [ ] Make sure the Polish update is an actual improvement and that it
make sense.

### No UI changes

Author: nalcalag

subscriptions/subscriptions-impl/src/main/res/values-pl/strings-subscriptions.xml

@@ -192,7 +192,7 @@
     <string name="feedbackSubCategoryDuckAiOther">Inne opinie o Duck.ai</string>
 
     <string name="subscriptionSettingSectionTitle" translatable="false">DuckDuckGo Subscription</string>
-    <string name="subscriptionSettingSubscribeSecure">Zabezpiecz Wi-Fi oraz używaj zaawansowanych modeli AI</string>
+    <string name="subscriptionSettingSubscribeSecure">Zabezpiecz Wi-Fi i czatuj prywatnie z zaawansowanymi modelami AI</string>
 
     <string name="subscriptionSettingGetRebranding">Subskrybuj DuckDuckGo</string>
     <string name="subscriptionSettingTryFreeTrialRebranding">Wypróbuj za darmo</string>