FIXES :- Improve review feature documentation commons-app#3361 (commons-app#4915)

* detailed explanation added

* done the requested changes

* requested changes done 2

Author: Rishavgupta12345

app/src/main/res/values/strings.xml

@@ -456,7 +456,7 @@ Upload your first media by tapping on the add button.</string>
   <string name="review_thanks_no_button_text">Yes, why not</string>
   <string name="skip_image_explanation">Clicking this button will give you another recently uploaded image from Wikimedia Commons</string>
 
-  <string name="review_image_explanation">You can review images and improve the quality of Wikimedia Commons.\n The four parameters of review are: \n - Is this image in-scope? \n - Does this image follow the rules of copyright? \n - Is this image correctly categorized? \n - If all goes well you can also thank the contributor.</string>
+  <string name="review_image_explanation">You can review images to improve the quality of Wikimedia Commons.\nThe three parameters of review are:\n\n- Is this image in-scope?\nWhen you tap No (out of scope), you are adding a deletion nomination template to this image.\n\n- Does this image follow the rules of copyright?\nWhen you tap No (does not follow the rules of copyright), you are adding a deletion nomination template to this image.\n\n- Is this image correctly categorized?\nWhen you tap No (not correctly categorized), you are adding a categorization request template to this image.\n\nIf everything is fine, no template is added to the image, and you get the opportunity thank the contributor.</string>
 
   <string name="no_image">No images used</string>
   <string name="no_image_reverted">No images reverted</string>