added link for binary_search.md

Author: rotarymars

reference/algorithm/binary_search.md

@@ -88,6 +88,11 @@ int main()
 }
 ```
 * std::binary_search[color ff0000]
+* std::vector[link /reference/vector/vector.md]
+* v.begin[link /reference/vector/vector/begin.md]
+* v.end[link /reference/vector/vector/end.md]
+* std::cout[link /reference/iostream/cout.md]
+* std::endl[link /reference/ostream/endl.md]
 
 #### 出力
 ```