[develop]: Add debugging guide to README.md

[MichaelLueken]

DESCRIPTION OF CHANGES:

Ben Brinkley, from EPIC's ECE team, has requested that the link to EPIC's debugging guide be added to the README.md file. This PR adds this link to the README.md file.

Type of change

• This change is a documentation update to the README.md file.

TESTS CONDUCTED:

None required

CHECKLIST

• My code follows the style guidelines in the Contributor's Guide
• I have performed a self-review of my own code using the Code Reviewer's Guide
• I have commented my code, particularly in hard-to-understand areas
• My changes need updates to the documentation. I have made corresponding changes to the documentation
• My changes do not require updates to the documentation (explain).
• My changes generate no new warnings
• New and existing tests pass with my changes
• Any dependent changes have been merged and published

CONTRIBUTORS (optional):

Ben Brinkley and EPIC ECE team.

[MichaelLueken]

Closing PR. Need PDF file to be available outside of NOAA-centric Google Doc.

[MichaelLueken]

The EPIC ECE team has hosted their Debugging Guide on the EPIC web site. This version is now being linked in the updated README.md file. Please take a moment and look at the change and approve if you are okay with it. Thanks!

[natalie-perlin]

Looks good!!

[gspetro-NOAA]

Agreed--looks good!