Fix broken links in docs (#221)

docs/contributing.md

@@ -6,7 +6,7 @@ title: "Contributing Guide"
 Thanks for taking interest in contributing to Chatwoot source code. Before submitting your contribution, please make sure to take a moment and read through the following guidelines:
 
 - [Code of Conduct](https://www.chatwoot.com/docs/code-of-conduct)
-- [Development Setup](https://www.chatwoot.com/docs/ubuntu-installation-guide)
+- [Development Setup](https://www.chatwoot.com/docs/installation-guide-ubuntu)
 - [Project Dependencies](https://www.chatwoot.com/docs/dependencies)
 - [Environment Setup](https://www.chatwoot.com/docs/environment-variables)
 

docs/development/environment-setup/mac-os.md

@@ -99,4 +99,4 @@ launchctl unload ~/Library/LaunchAgents/homebrew.mxcl.redis.plist
 brew install imagemagick
 ```
 
-Next: Read project setup to install project dependencies
+Next: [Read project setup to install project dependencies](https://www.chatwoot.com/docs/dependencies) 

docs/development/environment-setup/ubuntu.md

@@ -107,4 +107,4 @@ sudo systemctl enable redis-server.service
 sudo apt-get install imagemagick
 ```
 
-Next: Read project setup to install project dependencies
+Next: [Read project setup to install project dependencies](https://www.chatwoot.com/docs/dependencies) 

docs/development/environment-setup/windows.md

@@ -101,4 +101,4 @@ sudo systemctl enable redis-server.service
 sudo apt-get install imagemagick
 ```
 
-Next: Read project setup to install project dependencies
+Next: [Read project setup to install project dependencies](https://www.chatwoot.com/docs/dependencies)