Just link to top of repo

[mccalluc]

https://github.com/hubmapconsortium/portal-docs/blob/master/software.md

These links are all unnecessarily fragile: default branch may change, and there's just more room for typos.

Replace links like: https://github.com/hubmapconsortium/gateway/blob/test-release/README.md
with: https://github.com/hubmapconsortium/gateway#readme

[cebriggs7135]

On July 7, @mccalluc Slacked this note:

"The default branch for several repos has been changed from master to main so this should be addressed."

I'll leave these changes to Melissa @schwenk102 .

[cebriggs7135]

@mccalluc Please clarify which documents require these changes?

[mccalluc]

@cebriggs7135 : https://github.com/hubmapconsortium/portal-docs/blob/master/software.md is a place to start

[pecan88]

@schwenk102 - would you please respond here or turf to JH within Pitt-DBMI?

[pecan88]

@JAH386 - heads up re: this discussion. Would you please work with @schwenk102 to resolve?