SONAR-25112 fix minor radme typo for 9.9

Author: jCOTINEAU

charts/sonarqube-dce/README.md

@@ -66,7 +66,7 @@ In order to use it, please set the version constraint `~7`, which is equivalent
 Example:
 
 ```Bash
-helm upgrade --install -n sonarqube-dce --version '~7' sonarqube sonarqube/sonarqube-dce --set applicationNodes.jwtSecret=$JWT_SECRET
+helm upgrade --install -n sonarqube-dce --version '~7' sonarqube sonarqube/sonarqube-dce --set ApplicationNodes.jwtSecret=$JWT_SECRET
 ```
 
 ## How to use it