refine the format in acknowledgements

Author: jdneo

ACKNOWLEDGEMENTS.md

@@ -1,5 +1,5 @@
 A big thanks to the following individuals for contributing:
 
-[@TsFreddie](https://github.com/TsFreddie) for contributing [#19](https://github.com/jdneo/vscode-leetcode/pull/19).
-[@ntt2k](https://github.com/ntt2k) for contributing [#38](https://github.com/jdneo/vscode-leetcode/pull/38).
-[@Xeonacid](https://github.com/Xeonacid) for contributing [#58](https://github.com/jdneo/vscode-leetcode/pull/58).
+- [@TsFreddie](https://github.com/TsFreddie) for contributing [#19](https://github.com/jdneo/vscode-leetcode/pull/19).
+- [@ntt2k](https://github.com/ntt2k) for contributing [#38](https://github.com/jdneo/vscode-leetcode/pull/38).
+- [@Xeonacid](https://github.com/Xeonacid) for contributing [#58](https://github.com/jdneo/vscode-leetcode/pull/58).

README.md

@@ -67,7 +67,7 @@ Refer to [CHANGELOG](https://github.com/jdneo/vscode-leetcode/blob/master/CHANGE
 ## Acknowledgement
 
 - This extension is based on [@skygragon](https://github.com/skygragon)'s [leetcode-cli](https://github.com/skygragon/leetcode-cli) open source project.
-- Special thanks to our [contributors](https://github.com/jdneo/vscode-leetcode/blob/master/ACKNOWLEDGEMENTS.md)
+- Special thanks to our [contributors](https://github.com/jdneo/vscode-leetcode/blob/master/ACKNOWLEDGEMENTS.md).