added cogs.red link to helpful links

[orels1]

Before PR

Please make sure that you've completed the following steps

• [ ] Added frontmatter header to your doc based on this guide
• [ ] Formatted the doc to fit jekyll requirements based on this guide
• [ ] Added link to a sidebar based on this guide

Doc info

Please provide a required info on your PR

• Category:
• Subject:
• Author:

There are currently three categories available: troubleshooting, guides and custom cog documentation, please specify one of those in the list above Subject might be anything, but we recommend sticking to 3-4 words