fixed missing bullet

Signed-off-by: Matt Butcher <matt.butcher@microsoft.com>

ADOPTERS.md

@@ -1,5 +1,7 @@
- To add your organization to this list, simply add your organization's name,
- optionally with a link. The list is in alphabetical order.
+ To add your organization to this list, open a pull request that adds your
+ organization's name, optionally with a link. The list is in alphabetical order.
+
+ (Remember to use `git commit --signoff` to comply with the DCO)
 
 # Organizations Using Helm
 
@@ -8,5 +10,6 @@
 - [IBM](https://www.ibm.com)
 - [Qovery](https://www.qovery.com/)
 - [Samsung SDS](https://www.samsungsds.com/)
-[Ville de Montreal](https://montreal.ca)
+- [Ville de Montreal](https://montreal.ca)
+
 _This file is part of the CNCF official documentation for projects._