Adding 3Laws Sponsors Sept 2025 (#5505)

Signed-off-by: SteveMacenski <[email protected]>

Author: SteveMacenski

README.md

@@ -29,7 +29,7 @@ Please visit our [documentation site](https://docs.nav2.org/). [Please visit our
 Please thank our amazing sponsors for their generous support of Nav2 on behalf of the community to allow the project to continue to be professionally maintained, developed, and supported for the long-haul! [Open Navigation LLC](https://www.opennav.org/) provides project leadership, maintenance, development, and support services to the Nav2 & ROS community.
 
 <p align="center">
-  <img src="doc/sponsors_july_2025.png" />
+  <img src="doc/sponsors_sept_2025.png" />
 </p>
 
 ### [Dexory](https://www.dexory.com/) develops robotics and AI logistics solutions to drive better business decisions using a digital twin of warehouses to provide inventory insights.