[fenix] For https://github.com/mozilla-mobile/fenix/issues/22502 - Update "Jump back in" group's subtitle format

app/src/main/java/org/mozilla/fenix/home/recenttabs/view/RecentTabs.kt

@@ -207,7 +207,7 @@ private fun RecentSearchGroupItem(
 
                     Spacer(modifier = Modifier.width(8.dp))
 
-                    RecentTabSubtitle(subtitle = stringResource(R.string.recent_tabs_search_term_count, count))
+                    RecentTabSubtitle(subtitle = stringResource(R.string.recent_tabs_search_term_count_2, count))
                 }
             }
         }

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

@@ -142,8 +142,8 @@
         The first parameter is the search term that the user used. (for example: your search for "cat")-->
     <string name="recent_tabs_search_term">Your search for \"%1$s\"</string>
     <!-- Text for the number of tabs in a group in the 'Jump back in' section of the new tab
-        The first parameter is the count for number of sites in the group.  This number will always be more than one. -->
-    <string name="recent_tabs_search_term_count">Sites: %1$s</string>
+        %d is a placeholder for the number of sites in the group. This number will always be more than one. -->
+    <string name="recent_tabs_search_term_count_2">%d sites</string>
 
     <!-- History Metadata -->
     <!-- Header text for a section on the home screen that displays grouped highlights from the