Fix typos in comments and documentation (#1260)

* Initial plan

* Fix typos in comments and documentation

Co-authored-by: AtsushiSakai <[email protected]>

* Revert filename change in users_comments.md as requested

Co-authored-by: AtsushiSakai <[email protected]>

---------

Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: AtsushiSakai <[email protected]>

Author: Copilot

docs/modules/0_getting_started/3_how_to_contribute_main.rst

@@ -176,7 +176,7 @@ Adding the missed documentations for existing examples is also great contributio
 If you check the `Python Robotics Docs`_, you can notice that some of the examples
 only have a simulation gif or short overview descriptions or just TBD.,
 but no detailed algorithm or mathematical description.
-These documents needs to be improved.
+These documents need to be improved.
 
 This doc `how to write doc`_ can be helpful to write documents.
 

users_comments.md

@@ -101,7 +101,7 @@ Thank you!
 
 ---
 
-Dear AtsushiSakai, <br>Thanks a lot for the wonderful collection of projects.It was really useful. I really appreciate your time in maintaing and building this repository.It will be really great if I get a chance to meet you in person sometime.I got really inspired looking at your work. <br>All the very best for all your future endeavors! <br> Thanks once again, <br>
+Dear AtsushiSakai, <br>Thanks a lot for the wonderful collection of projects.It was really useful. I really appreciate your time in maintaining and building this repository.It will be really great if I get a chance to meet you in person sometime.I got really inspired looking at your work. <br>All the very best for all your future endeavors! <br> Thanks once again, <br>
 
 ---Ezhil Bharathi 
 
@@ -163,7 +163,7 @@ so kind of you can you make videos of it.
 
 ---
 
-Dear AtshshiSakai, <br>You are very wise and smart that you created this library for students wanting to learn Probabilistic Robotics and actually perform robot control. <br>Hats off to you and your work. <br>I am also reading your book titled : Python Robotics
+Dear AtsushiSakai, <br>You are very wise and smart that you created this library for students wanting to learn Probabilistic Robotics and actually perform robot control. <br>Hats off to you and your work. <br>I am also reading your book titled : Python Robotics
 
 --Himanshu
 
@@ -263,7 +263,7 @@ Hey Atsushi <br>We are working on a multiagent simulation game and this project
 
 ---
 
-Thanks a lot for this amazing set of very useful librarires!
+Thanks a lot for this amazing set of very useful libraries!
 
 --Razvan Viorel Mihai
 
@@ -275,7 +275,7 @@ Dear Atsushi Sakai, <br> <br>This is probably one of the best open-source roboti
 
 ---
 
-hanks frnd, for ur contibusion
+Thanks friend, for your contribution
 
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