Fixed typos in doc/index.rst (#675)

Author: ckunki

project-template/{{cookiecutter.repo_name}}/doc/index.rst

@@ -10,19 +10,21 @@ Documentation of  {{cookiecutter.project_name}}
         :link: user_guide
         :link-type: ref
 
-        Resource for users to understand how to utilize this project and its features.
+        Resource for users to understand how to utilize this project and its
+        features.
 
     .. grid-item-card:: :octicon:`tools` Developer Guide
         :link: developer_guide
         :link-type: ref
 
-        Instructions and best practices to help developers contribute to the project and set up their development environment.
+        Instructions and best practices to help developers contributing to the
+        project and setting up their development environment.
 
     .. grid-item-card:: :octicon:`question` FAQ
         :link: faq
         :link-type: ref
 
-        Frequently asked questsions.
+        Frequently asked questions.
 
 .. toctree::
    :maxdepth: 1