Update README.md

Co-authored-by: Jay DeLuca <[email protected]>

Author: steverao

README.md

@@ -105,7 +105,7 @@ having to create a separate distribution or to fork this repository. For example
 custom samplers or span exporters, set new defaults, and embed it all in the agent to obtain a
 single jar file.
 
-## Creating agent distribution
+## Creating an agent distribution
 
 [Distro](examples/distro/README.md) provides guidance on creating a separate distribution, serving as a collection of examples for extending the functionality of the OpenTelemetry Java instrumentation agent. It also demonstrates how to repackage the agent while incorporating custom features.