fix: Fixed a few broken links and updated info regarding Amazon Cloud9 (#800)

Co-authored-by: Madison Webb <madison@Madis-MacBook-Pro.local>

Author: madisonewebb

docs/6-software-development-practices/6.2-jira.md

@@ -100,7 +100,7 @@ Jira refers to tickets as *issues.* Although there are various ticket types out
 
 ### Content
 
-- Make sure that each ticket has [Acceptance Criteria](6-software-development-practices/5.1.4-stories.md)
+- Make sure that each ticket has [Acceptance Criteria](6-software-development-practices/6.1.4-stories.md)
 - A Definition of Done (DOD) should be located in the summary of the ticket
 - The summary should be updated with any relevant links
 - Solutions should be easily repeatable by anyone

docs/6-software-development-practices/6.4-pairprogramming.md

@@ -41,7 +41,7 @@ Not only does VSCode allow participants to share projects in real-time, they are
 
 ## VSCode Pair Programming Alternatives
 
-- [AWS Cloud9](https://aws.amazon.com/cloud9/) is a cloud-based integrated development environment used to author and debug source code. With Cloud9, you can quickly share your development environment with your team, enabling you to pair program and track each other's inputs in real-time. In cases where an enterprise does not permit the installation of software on client laptops, Cloud9 still provides a robust means of accessible, pair programming.
+- [AWS Cloud9](https://aws.amazon.com/cloud9/) is a cloud-based integrated development environment used to author and debug source code. With Cloud9, you can quickly share your development environment with your team, enabling you to pair program and track each other's inputs in real-time. In cases where an enterprise does not permit the installation of software on client laptops, Cloud9 still provides a robust means of accessible, pair programming. As of 2024, AWS has closed Cloud9 to new customers and no longer develops new features for the service.
 
 - [Jetbrain's IntelliJ IDEA](https://www.jetbrains.com/idea/) tool lets you use the Code With Me plugin to allow participants to share their locally running project with anyone. You can use Code With Me for real-time collaboration, editing code, sharing a server, and running a debugging session.
 

docs/8-infrastructure-configuration-management/8.0-overview.md

@@ -12,7 +12,7 @@
 
 ## Concepts
 
-Managing infrastructure generally involves provisioning new resources and configuring those resources. Sometimes the distinction between these two operations is blurred but thinking about how (or if) the tools in the chapter handle each can help understand why the tools are designed the way they are. Your experience in chapter *4 Cloud Computing* gave you some examples for provisioning new resources and you should have come across some examples of configuring systems in the virtualization part of chapter *3 Virtual Machines and Containers.*
+Managing infrastructure generally involves provisioning new resources and configuring those resources. Sometimes the distinction between these two operations is blurred but thinking about how (or if) the tools in the chapter handle each can help understand why the tools are designed the way they are. Your experience in chapter *5 Cloud Computing* gave you some examples for provisioning new resources and you should have come across some examples of configuring systems in the virtualization part of chapter *4 Virtual Machines and Containers.*
 
 ### Immutable Infrastructure