README, COMMUNITY-ROLES: fix typos (#12914)

Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>

COMMUNITY-ROLES.md

@@ -21,7 +21,7 @@ the metrics used are objective, easy to check, and explicitly described below. (
 exceptions can always be considered through open community discussion.)
 
 > [!IMPORTANT]
-> It is required to have [two factor authentication](https://github.com/settings/security) (2FA) enabled for your GitHub account to be added as a outside collaborator or a member to the tldr-pages organization.
+> It is required to have [two-factor authentication](https://github.com/settings/security) (2FA) enabled for your GitHub account to be added as an outside collaborator or a member of the tldr-pages organization.
 
 ## When to change roles
 
@@ -109,7 +109,7 @@ using one of the template messages below as a base.
    Either way, thanks for all your work so far!
 
    > [!NOTE]
-   > It is required to have [two factor authentication](https://github.com/settings/security) (2FA) enabled for your GitHub account to be added as a collaborator the tldr-pages/tldr repository.
+   > It is required to have [two-factor authentication](https://github.com/settings/security) (2FA) enabled for your GitHub account to be added as a collaborator to the tldr-pages/tldr repository.
    ```
 
 2. Once they acknowledge the message and if they accept the invitation,

README.md

@@ -50,7 +50,7 @@ How about:
 </picture>
 
 This repository is just that: an ever-growing collection of examples
-for the most common UNIX, Linux, macOS, SunOS, Android and Windows command-line tools.
+for the most common UNIX, Linux, macOS, SunOS, Android, and Windows command-line tools.
 
 ## How do I use it?
 
@@ -96,7 +96,7 @@ All contributions are welcome!
 
 Some ways to contribute include:
 
-- Adding your favorite command which isn't covered.
+- Adding your favorite command that isn't covered.
 - Adding examples or improving the content of an existing page.
 - Adding requested pages from our issues with the [help wanted](https://github.com/tldr-pages/tldr/issues?q=is%3Aopen+is%3Aissue+label%3A%22help+wanted%22) label.
 - Translating pages into different languages.
@@ -116,11 +116,11 @@ You are also welcome to join us on the [matrix chatroom](https://matrix.to/#/#tl
 ## Similar projects
 
 - [Command Line Interface Pages](https://github.com/command-line-interface-pages)
-  allows you to write standardized help pages for CLI, directories and configs.
+  allows you to write standardized help pages for CLI, directories, and configs.
 
 - [Cheat](https://github.com/cheat/cheat)
   allows you to create and view interactive cheatsheets on the command-line.
-  It was designed to help remind *nix system administrators of options
+  It was designed to help remind Unix system administrators of options
   for commands that they use frequently, but not frequently enough to remember.
 
 - [cheat.sh](https://cheat.sh/)