added link for fill.md

Author: rotarymars

reference/algorithm/fill.md

@@ -85,6 +85,11 @@ int main() {
 }
 ```
 * std::fill[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::for_each[link /reference/algorithm/for_each.md]
+* std::cout[link /reference/iostream/cout.md]
 
 #### 出力
 ```