update to Matsci Discourse group

Author: computron

.github/ISSUE_TEMPLATE.md

@@ -1,5 +1,5 @@
 Please submit help issues to:
-https://hackingmaterials.discourse.group/c/fireworks
+https://discuss.matsci.org/c/fireworks
 
 The Github issues is no longer used except for internal development purposes.
 

CONTRIBUTING.md

@@ -7,7 +7,7 @@ We love your input! We want to make contributing to FireWorks as easy and transp
 * Becoming a maintainer
 
 ## Reporting bugs, getting help, and discussion
-At any time, feel free to start a thread on our [Discourse forum](https://hackingmaterials.discourse.group/c/fireworks).
+At any time, feel free to start a thread on our [Discourse forum](https://discuss.matsci.org/c/fireworks).
 
 If you are making a bug report, incorporate as many elements of the following as possible to ensure a timely response and avoid the need for followups:
 * A quick summary and/or background

README.md

@@ -3,7 +3,7 @@
 FireWorks stores, executes, and manages calculation workflows.
 
 - **Website (including documentation):** https://materialsproject.github.io/fireworks/
-- **Help/Support:** https://hackingmaterials.discourse.group/c/fireworks
+- **Help/Support:** https://discuss.matsci.org/c/fireworks
 - **Source:** https://github.com/materialsproject/fireworks/
 
 If you like FireWorks, you might also like [rocketsled](https://github.com/hackingmaterials/rocketsled).

docs_rst/index.rst

@@ -259,7 +259,7 @@ Want to see something added or changed? There are many ways to make that a reali
 * Point us to areas of the code that are difficult to understand or use.
 * Contribute code! If you are interested in this option, please see our :doc:`contribution guidelines</contributing>`.
 
-Please submit questions, issues / bug reports, and all other communication through the `FireWorks Discourse forum <https://hackingmaterials.discourse.group/c/fireworks>`_.
+Please submit questions, issues / bug reports, and all other communication through the `FireWorks Discourse forum <https://discuss.matsci.org/c/fireworks>`_.
 
 Make contributions through GitHub using our `Contribution Guidelines. <https://github.com/materialsproject/fireworks/blob/master/CONTRIBUTING.md>`_