Update articles/azure-monitor/app/java-get-started-supplemental.md

Co-authored-by: Trask Stalnaker <[email protected]>

Author: jeanbisutti

articles/azure-monitor/app/java-get-started-supplemental.md

@@ -55,7 +55,7 @@ ENV APPLICATIONINSIGHTS_CONNECTION_STRING="CONNECTION-STRING"
 ENTRYPOINT["java", "-javaagent:applicationinsights-agent-3.4.12.jar", "-jar", "app.jar"]
 ```
 
-In this example we have copied the `applicationinsights-agent-3.4.12.jar` and `applicationinsights.json` files from an `agent` folder (you can choose any folder of your machine). These two files has to be in the same folder in the Docker container.
+In this example we have copied the `applicationinsights-agent-3.4.12.jar` and `applicationinsights.json` files from an `agent` folder (you can choose any folder of your machine). These two files have to be in the same folder in the Docker container.
 
 ### Third-party container images