chore: update issue screen with accelerator link

Author: agviegas

.github/ISSUE_TEMPLATE/config.yml

@@ -1,4 +1,7 @@
 contact_links:
+  - name: Want our help? 🤝
+    url: https://thatopen.com/accelerator
+    about: Are you developing a project with our technology and would like our help? Apply now to join That Open Accelerator Program!
   - name: Community
     url: https://people.thatopen.com/
     about: Join the community and discuss with other BIM software developers in real time.