Open Join Us form (#336)

* Updates

* Capitalization

Author: jaywonchung

_config.yml

@@ -211,7 +211,7 @@ theme_config:
     Open Source: /open-source || fab fa-github-alt
     #GitHub: https://github.com/SymbioticLab || fab fa-github-alt
     # Wiki: https://symbiotic.eecs.umich.edu/wiki || fab fa-wikipedia-w
-    # Join us: https://forms.gle/L3Syau9dBzi8eLxQ7 || fa fa-user-plus
+    Join Us: https://forms.gle/L3Syau9dBzi8eLxQ7 || fa fa-user-plus
     # Collaboration: https://docs.google.com/document/d/1mVPqfnqLz_CXVz8XyDLcB1BIlUyezY2A-t5mV33JZHw/edit?usp=sharing || fa fa-user-plus
 
   # Enable / Disable menu icons / item badges.

source/_front.md

@@ -4,7 +4,7 @@ This boils down to three operating regimes: single-microsecond latency *within a
 
 ![Overview](/assets/latency-domains.png)
 
-<!--[**Join SymbioticLab**](https://forms.gle/L3Syau9dBzi8eLxQ7) to work on first-of-its-kind projects made possible by the [SymbioticLab cluster](/cluster/)!-->
+[**Join SymbioticLab**](https://forms.gle/L3Syau9dBzi8eLxQ7) to work on impactful first-of-its-kind projects!
 
 [**Learn about openings in ongoing projects**](https://docs.google.com/document/d/1mVPqfnqLz_CXVz8XyDLcB1BIlUyezY2A-t5mV33JZHw/edit?usp=sharing) if you're already in Michigan.