Fix main github repo links in docs

This updates all references from github.com/runtimeco to
github.com/JuulLabs-OSS in docs and yml files.

Signed-off-by: Fabio Utzig <utzig@apache.org>
diff --git a/docs/SubmittingPatches.md b/docs/SubmittingPatches.md
index da104ec..8a6cf7c 100644
--- a/docs/SubmittingPatches.md
+++ b/docs/SubmittingPatches.md
@@ -1,7 +1,7 @@
 # Submitting Patches
 
 Development on mcuboot primarily takes place in github, at:
-https://github.com/runtimeco/mcuboot
+https://github.com/JuulLabs-OSS/mcuboot
 
 Changes should be submitted via github pull requests.  Each commit
 should have a Signed-off-by line for the author (and the committer, if