Add second link to FEGA Node Operations Guidelines. Fixes #37

[malloryfreeberg]

Description

Fixes issue #37

Motivation and Context

Adding a second link to this important document to make it more findable.

How has this been tested?

Viewed link in preview mode.

What should reviewers focus on?

Does the link take you to the correct document (PDF titled "Federated EGA Node Operations Guidelines" version 2.0).

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New content (non-breaking change which adds new content)
• Modified content (non-breaking change which modifies existing content)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• I have read the CONTRIBUTING.md guide.
• My changes follow the code style of this project.
• I have updated supporting documentation, if required.
• I have added my details to the CONTRIBUTORS.yaml file.