Fix typo in README

Author: seanchen1991

README.md

@@ -18,7 +18,7 @@ Inside the `src` directory you'll also find the `heap.js` file with the complete
 Run `npm test heap` to run the tests for your `heapsort` function to ensure that your implementation is correct.
 
 ### Task 3. Analyze some runtimes
-Open up the `Answers.md` file. This is where you'll jot down your answers for the runtimes of the two functions you just implemented, as well as the methods you implemented for all of the data structures. Be sure to also answer any other questions posed in the `Answers.md` file!
+Open up the `Data_Structures_Answers.md` file. This is where you'll jot down your answers for the runtimes of the two functions you just implemented, as well as the methods you implemented for all of the data structures. Be sure to also answer any other questions posed in the `Answers.md` file!
 
 ## Algorithms
 For the algorithms portion of the sprint challenge, you'll be answering questions posed in the `exercises.pdf` document inside the `algorithms` directory. Add your answers to the questions in the `Algorithms_Answers.md` file.