update references to old repo with new repo location

CONTRIBUTING.md

@@ -136,7 +136,7 @@ Core developers should read the material on the [LinkML site](https://linkml.io/
 [about-branches]: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/proposing-changes-to-your-work-with-pull-requests/about-branches
 [about-issues]: https://docs.github.com/en/issues/tracking-your-work-with-issues/about-issues
 [about-pulls]: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/proposing-changes-to-your-work-with-pull-requests/about-pull-requests
-[issues]: https://github.com/bfurner/bdchm/issues/
-[pulls]: https://github.com/bfurner/bdchm/pulls/
+[issues]: https://github.com/RTIInternational/NHLBI-BDC-DMC-HM/issues/
+[pulls]: https://github.com/RTIInternational/NHLBI-BDC-DMC-HM/pulls/
 
 We recommend also reading [GitHub Pull Requests: 10 Tips to Know](https://blog.mergify.com/github-pull-requests-10-tips-to-know/)

mkdocs.yml

@@ -16,7 +16,7 @@ nav:
   - Index: index.md
   - About: about.md
 site_url: https://bfurner.github.io/bdchm
-repo_url: https://github.com/bfurner/bdchm
+repo_url: https://github.com/RTIInternational/NHLBI-BDC-DMC-HM
 
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