ci: Updating the discovery link to an official release. (#109)

Author: sdelliot

.github/actions/prepare-discovery/action.yml

@@ -9,7 +9,7 @@ runs:
   steps:
     - name: Install discovery
       run: |
-        wget https://github.com/mitchnegus/minimega-discovery/releases/download/firewheel-debian_faed761/discovery.deb
+        wget https://github.com/sandia-minimega/discovery/releases/download/v0.1.0/discovery.deb
         sudo dpkg -i discovery.deb
         sudo chown -R $USER:minimega /opt/discovery
       shell: bash