[fenix] Temporarily fix lint issues with bad translation of string (https://github.com/mozilla-mobile/fenix/pull/6963)

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

@@ -1058,7 +1058,7 @@
     <!-- Placeholder text shown in the Search String TextField before a user enters text -->
     <string name="search_add_custom_engine_search_string_hint">Řetězec používaný pro vyhledávání</string>
     <!-- Description text for the Search String TextField. The %s is part of the string -->
-    <string name="search_add_custom_engine_search_string_example">Dotaz nahraďte „% s“, Příklad: \nhttps://www.google.com/search?q=%s</string>
+    <string name="search_add_custom_engine_search_string_example">Dotaz nahraďte „%s“. Příklad: \nhttps://www.google.com/search?q=%s</string>
     <!-- Text for the button to learn more about adding a custom search engine -->
     <string name="search_add_custom_engine_learn_more_label">Zjistit více</string>