added link for lexicographical_compare_three_way.md

Author: rotarymars

reference/algorithm/lexicographical_compare_three_way.md

@@ -114,7 +114,19 @@ int main() {
   }
 }
 ```
+* std::lexicographical_compare_three_way[color ff0000]
+* std::string[link /reference/string/string.md]
+* std::cout[link /reference/iostream/cout.md]
+* std::endl[link /reference/ostream/endl.md]
+* std::isalpha[link /reference/cctype/isalpha.md]
+* std::tolower[link /reference/cctype/tolower.md]
 * weak_ordering[link /reference/compare/weak_ordering.md]
+* str1.begin[link /reference/string/string/begin.md]
+* str1.end[link /reference/string/string/end.md]
+* str2.begin[link /reference/string/string/begin.md]
+* str2.end[link /reference/string/string/end.md]
+* str3.begin[link /reference/string/string/begin.md]
+* str3.end[link /reference/string/string/end.md]
 
 ### 出力例
 ```