Improving the CONTRIBUTING file, and citing it in the README file

Author: mgm8

CONTRIBUTING.md

@@ -1,3 +1,5 @@
 # Contributing
 
-All contributions are welcome! If you found a bug, developed a new feature or want to improve the documentation, there two ways to do so: open a issue describing the suggested modification, or by opening a pull request.
+All contributions are welcome! If you found a bug, developed a new feature, or want to improve the documentation, there are two ways to do so: open an issue describing the suggested modification, or by opening a pull request.
+
+Any questions or suggestions can also be addressed to Gabriel Mariano Marcelino <[[email protected]](mailto:[email protected])>.

README.md

@@ -37,6 +37,8 @@ Or, directly from the source files:
 
 The documentation page is available [here](https://mgm8.github.io/pyngham/). Instructions to build the documentation page are described below.
 
+Contributing instructions are also available [here](https://github.com/mgm8/pyngham/blob/main/CONTRIBUTING.md).
+
 ### Dependencies
 
 * [Sphinx](https://pypi.org/project/Sphinx/)