Description of PR purpose/changes

This updates all the docs links from the old http://www.kbase.us/data-upload-download-guide to the new https://docs.kbase.us/data/upload-download-guide/. It also adds an external link target to those links to prevent accidentally navigating out of a narrative and possibly losing work.

It also removes slebras from the "owners" list of this module.

Jira Ticket / Issue

https://kbase-jira.atlassian.net/browse/PUBLIC-2378

[x] Added the Jira Ticket to the title of the PR e.g. (DATAUP-69 Adds a PR template)

Testing Instructions

Details for how to test the PR:
[x] Tests pass in Travis-CI and locally

Dev Checklist:

[x] My code follows the guidelines at https://sites.google.com/truss.works/kbasetruss/development
[x] I have performed a self-review of my own code
[x] I have commented my code, particularly in hard-to-understand areas
[x] I have made corresponding changes to the documentation, including updating the README with app information changes
[x] My changes generate no new warnings
[n/a] I have added tests that prove my fix is effective or that my feature works
[x] New and existing tests pass locally with my changes
[x] Any dependent changes have been merged and published in downstream modules

Updating Version and Release Notes (if applicable)

[x] Version has been bumped in kbase.yml
[x] Release notes have been updated for each release (and during the merge of feature branches)

kbaseapps / kb_uploadmethods

PUBLIC-2378 update docs links, link targets #356

Description of PR purpose/changes

Jira Ticket / Issue

Testing Instructions

Dev Checklist:

Updating Version and Release Notes (if applicable)